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High density, skin effect, and environmental instability are significant limitations that restrict the application of metal-based microwave absorbers in achieving lightweight, high performance, and long service life. This study broke from traditional methods for preparing a microwave absorber Mn 2 O 3 -Fe 3 O 4 @PPy (polypyrrole) by employing an innovative annealing process to convert metal into metal oxide by the introduction of metal organic framework (MOF), which effectively achieving a more lightweight absorber material with hollow porous nanocube structure. Subsequently, PPy was coated onto the metal oxide surface to form a core-shell structure by a situ chemical oxidation synthesis method. The combination of metal oxide of the hollow porous nanocube structure and the core-shell structure formed by highly conductive PPy shell significantly enhanced heterogeneous interfaces and electromagnetic (EM) wave reflection. Excellent dielectric loss and impedance matching contributed evidently to the ultra-wideband EM wave absorption performance. It was demonstrated that, with a filling amount of only 20 wt%, the prepared Mn 2 O 3 -Fe 3 O 4 @PPy achieved an effective bandwidth (EAB) of 10.0 GHz at a thickness of 3.08 mm, with EAB max reaching 13 GHz. At a filling amount of only 10 wt%, the reflection loss (RL) was −62.13 dB, achieving an EAB of 7.4 GHz at 2.98 mm thickness, with EAB max reaching 11.4 GHz. Furthermore, the proposed strategy incorporating metal oxide and PPy enhanced corrosion resistance with higher charge transfer resistance. The ultra-wideband microwave absorption material uses an innovative annealing process for MOF, and then ingenious combines with the coated PPy to form a hollow porous nanocube core-shell structure. Excellent microwave absorption performance: EAB max = 13 GHz, RL min = −62.13 dB, low fill of 10 wt%. In addition, the corrosion resistance of the metal is improved. [Display omitted] [ABSTRACT FROM AUTHOR]

A novel acyl chloride-mediated strategy is used to synthesize rhodanine-modified UiO-66 adsorbent. Benefitting from the high grafting density of rhodanine, the optimal UiO-66-NH 2 @20Rd exhibits ultra-high adsorption capacity and selectivity for Ag(I) recovery. This study highlights that such a general strategy can provide a valuable avenue toward various functional adsorption materials. [Display omitted] Silver (Ag) recovery is essential for ecological protection, human health and economic benefits. Effective capture of Ag(I) from wastewater is still challenging due to insufficient accessible sites of adsorbents. Herein, an acyl chloride-mediated strategy is developed to synthesize rhodanine (Rd) modified UiO-66 derivatives for Ag(I) adsorption. Benefitting from the high grafting density of Rd, the optimal Rd-modified UiO-66-NH 2 (UiO-66-NH 2 @20Rd) features an ultra-high uptake capacity (maximum capacity of 923.9 mg·g−1) and selectivity (maximum selectivity coefficient of 1665.52) for Ag(I). Almost 90 % of Ag(I) could be captured in one minute over UiO-66-NH 2 @20Rd and maintained a removal rate of 98.9 % even after six cycles. Moreover, a fixed-bed column test demonstrates that approximately 21,780 bed volumes of Ag(I) simulated wastewater can be effectively treated, indicating great promise for practical application. Mechanism investigation illustrates that outstanding performance can be attributed to the synergistic effect of Ag(I) adsorption and reduction on dense rhodanine sites. This study highlights that such a general strategy can provide a valuable avenue toward various functional adsorption materials. [ABSTRACT FROM AUTHOR]

A copper porphyrin‐derived metal–organic framework electrocatalyst, FICN‐8, was synthesized and its catalytic activity for CO2 reduction reaction (CO2RR) was investigated. FICN‐8 selectively catalyzed electrochemical reduction of CO2 to CO in anhydrous acetonitrile electrolyte. However, formic acid became the dominant CO2RR product with the addition of a proton source to the system. Mechanistic studies revealed the change of major reduction pathway upon proton source addition, while catalyst‐bound hydride (*H) species was proposed as the key intermediate for formic acid production. This work highlights the importance of electrolyte composition on CO2RR product selectivity. [ABSTRACT FROM AUTHOR]

Developing high-performance, eco-friendly bifunctional electrocatalysts is crucial to popularizing water electrolysis for hydrogen production, but it still presents major challenges. Here, we develop a composite material with NiSe 2 -FeSe 2 heterostructure loaded on N-doped carbon layers by utilizing the metal-organic framework as a sacrificial template (NiSe 2 -FeSe 2 /NC). According to microstructural studies, direct contact between NiSe 2 and FeSe 2 induces charge transfer and enhances conductivity, while sensible arraying of NiSe 2 -FeSe 2 /NC nanosheets fully exposes active sites and protects catalysts from violent reaction processes. The NiSe 2 -FeSe 2 /NC heterostructured catalysts show excellent bifunctional catalytic activity for hydrogen and oxygen evolution reactions, with overpotentials of 54 and 232 mV at 10 mA cm−2, respectively. Moreover, NiSe 2 -FeSe 2 /NC also retains superiority in a two-electrode system, needing lower voltage to drive the overall water splitting at 10 mA cm−2 (1.53 V) than Pt/C||RuO 2 as well as long-term stability. This work introduces a novel concept for developing state-of-the-art non-noble metal catalysts for hydrogen production and new insights into interface engineering. [Display omitted] • A novel MOF-derived NiSe 2 -FeSe 2 /NC heterostructured catalyst was prepared. • Direct contact between NiSe 2 and FeSe 2 induces charge transfer. • NiSe 2 -FeSe 2 /NC drive water splitting needs a voltage of 1.53 V at 10 mA cm-2. [ABSTRACT FROM AUTHOR]

ABSTRACT The biological conversion method using immobilized enzymes has become an important means to produce ginsenosides. Among them, the preprepared Zn‐Ni MOF could be used to immobilize glycosyltransferase by specific adsorption for ginsenoside Rh2 production. However, the low enzyme load of Zn‐Ni MOF limited its wide application. In this study, we successfully synthesized the Glu@Zn‐Ni MOF filled with nanospheres by modifying the previously prepared Zn‐Ni MOF with glutamic acid (Glu) through ligand exchange. This modification significantly increased the specific surface area of the Glu@Zn‐Ni MOF and enhanced the material's enzyme‐carrying capacity. After immobilizing glycosyltransferase (UGT) onto the Glu@Zn‐Ni MOF, the UGT@Glu@Zn‐Ni MOF demonstrated improved stability across different pH levels, temperatures, and repeated cycles. After seven cycles, the immobilized enzyme remained at 83.42% of its initial enzyme activity. To further enhance the process, we incorporated immobilized sucrose synthase into the system to form a coupled reaction. This approach not only reduced substrate costs but also increased the yield of ginsenoside Rh2. By optimizing the coupling reaction through adjustments to the reaction conditions and the addition of suitable surfactants and organic solvents, we achieved a yield of 5.41 μg/mL of Rh2. The development and optimization of this material hold significant potential and value for industrial applications in both material enhancement and ginsenoside synthesis. [ABSTRACT FROM AUTHOR]

Metal–organic frameworks (MOF) have been vigorously investigated as hybrid materials in recent decades due to their exceptional structural versatility and applications in diverse fields. The development of novel MOFs for radiation detection and luminescence-based dosimetry is the latest topic of interest. In this contribution, we have synthesized and characterized a Uranyl MOF, which shows an optically stimulated luminescence (OSL) phenomenon induced by ionizing radiation. OSL dosimetric studies were carried out on Uranyl MOF, which revealed that MOF has a linear dose–response up to 100 Gy with a 1.1 Gy minimum detection dose. It also shows good reusability, around 30% fading in one day, very low fading beyond one day to 30 days, and decent radiation stability (stable up to 10 kGy). Preliminary dosimetry results are promising and show that Uranyl MOF can be utilized in the field of low-dose radiation processing applications in the future. [ABSTRACT FROM AUTHOR]

The innovation of high‐performance, stable electrocatalysts for clean energy systems faces significant challenges. Metal‐organic frameworks (MOFs), with their porous nature, flexible structures, and homogeneous active site dispersion, have gained interest as unique precursors for carbon‐based catalysts. MOFs' properties significantly enhance catalytic performance in fuel cells. This review highlights recent advancements in MOF design for oxygen electrocatalysis in fuel cells, while also discussing perspectives for future material innovations to improve catalytic activity in this emerging field. [ABSTRACT FROM AUTHOR]

Air cathode microbial fuel cell (MFC) can use the biological activities of microorganisms to convert organic matter into ideal electrical energy, but this efficiency has not been satisfactory. The air cathode requires an optimal catalyst to enhance the power output of the MFC by improving its low oxygen reduction reaction (ORR) activity. Micro Cu-doped Co3O4 nano-flower-like catalyst is successfully synthesized in this study using a metal-organic framework as the precursor material. The addition of 5% Cu induces a higher concentration of oxygen vacancies, thereby optimizing the local electronic state of the active site and enhancing the catalytic performance for oxygen reduction in the 5% Cu-Co3O4 material. Consequently, when equipped with this material, the power output of the air cathode MFC is approximately 2.85 times greater than that achieved with pure Co3O4. This provides a novel design idea for the application of nano-flower-like transition metal oxygen reduction catalysts in MFC. [ABSTRACT FROM AUTHOR]

A copper coordinated L-ascorbic acid (Cu@AACP) metal–organic framework was synthesized and characterized by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), atomic absorption spectroscopy (AAS), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), wavelength dispersive X-ray spectroscopy (WDX), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The BET method was used to investigate the textural characteristics of Cu@AACP, including surface area, pore diameter and total pore volume. The SEM analysis was used to investigate the morphology and size of Cu@AACP particles. AAS, WDX and EDS techniques were used to investigate the elemental content of Cu@AACP. The TGA analysis was used to investigate the presence of solvents or moisture, thermal stability and organic–inorganic content of catalyst. The FT-IR spectroscopy was used to the characterization of functional groups in the structure of the materials. The XRD pattern was used to investigate the crystalline phase of the catalyst. The results of the analyses confirmed the successful synthesis of copper MOF of L-ascorbic acid (Cu@AACP). The catalytic performance of Cu@AACP was examined in synthesizing of 2, 3-dihydroquinazolin-4(1H)-ones (through condensation of aldehydes and anthranilamide in ethanol at 80 °C) and polyhydroquinolines (through condensation of aldehydes, dimedone, ammonium acetate and ethyl acetoacetate in ethanol at 80 °C). The reaction conditions for the synthesis of 2, 3-dihydroquinazolin-4(1H)-ones and polyhydroquinolines were optimized, where the best results were obtained in ethanol solvent at 80 °C in the presence of 6 mg of Cu@AACP as catalyst. The results show that an improved product yield is obtained between 84 and 95%. Recycle test of the catalyst confirmed that the heterogeneous catalyst exhibited good catalytic stability, efficiency and very high activity in successive runs because of its unique pore network. To show the stability of Cu@AACP nanocatalyst after recycling, the recovered catalyst was characterized by AAS, FE-SEM, EDS and FT-IR techniques. [ABSTRACT FROM AUTHOR]

The work reported herein describes the synthesis of a 3D material UiO-66(Zr)-NH-OC-MWCNT by combining a synthesized metal–organic framework UiO-66(Zr)-NH2 and a carboxy functionalized multi-walled carbon nanotube MWCNT-COOH via an amide linkage and demonstrated its application for simultaneous electrochemical determination of two benzimidazole fungicides-carbendazim and thiabendazole. Different analytical techniques like Fourier transform infrared spectroscopy, X-ray diffraction analysis, Brunauer–Emmett–Teller analysis, and Field emission scanning electron microscopy were employed to characterize all the synthesized materials. The electrochemical characterization of the fabricated electrode was carried out using cyclic voltammetry and electrochemical impedance spectroscopy. Cyclic voltammetry and differential pulse voltammetry techniques have been used for the electroanalysis of carbendazim and thiabendazole. A limit of detection of 0.077 µM and 0.557 µM, respectively, have been obtained in the calibration range of 0.1 to 40 µM for carbendazim and 1 to 40 µM for thiabendazole, after optimization of several parameters which are susceptible to the sensitivity and selectivity of the developed sensor. Furthermore, with satisfactory results from the study of interferences, repeatability, and reproducibility, the proposed electrochemical sensor was successfully applied for analysis of carbendazim and thiabendazole in real samples. [ABSTRACT FROM AUTHOR]

In this work, a ZIF-67/MWCNTs/Nafion sensor platform was constructed based on the good adsorption capacity of ZIF-67, the electrical conductivity of multiwalled carbon nanotubes (MWCNTs), and the excellent chemical stability of Nafion for the detection of Cu2+ in water. Meanwhile, the modified materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET-specific surface area test, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Fourier-transform infrared spectrometry (FTIR). Cyclic voltammetry (CV), electrochemical impedance (EIS), and square wave stripping voltammetry (SWSV) electrochemical methods were used to perform applied test studies on ZIF-67/MWCNTs/Nafion/GCE. The results show that ZIF-67/MWCNTs/Nafion/GCE has high sensitivity (57.5 μA/μM) and a low limit of detection (15.0 nM) for the electrochemical detection of Cu2+ ions in an electrochemical sensing system. It has high adsorption selectivity for Cu2+, and the recovery of Cu2+ in real water reached 98.6–103%. The modified electrode has good repeatability, reproducibility, anti-interference, and stability, which means this sensing platform can be practically applied to the detection of domestic water. [ABSTRACT FROM AUTHOR]

New chloride‐ and bromide‐modified metal–organic frameworks (MOFs) based on copper and 1,3‐bis (carboxymethyl)imidazole (bcmim) derivatives have been prepared via post–synthetic modification (PSM) or by a direct route, following a simple, effective, and sustainable protocol. These materials have been characterized, and their catalytic activity has been studied. Cu‐bcmim‐Cl and Cu‐bcmim‐Br materials have been shown to be more efficient acidic catalytic systems than nonmodified materials. The catalytic activity has been tested as a Lewis acid catalyst in the methanolysis of styrene oxide and in the synthesis of quinolines and acridines, with the recovery and recyclability of the catalysts being possible. Furthermore, the catalytic activity of the catalysts has been tested in the oxidative coupling of formamides and carboxylic acids. [ABSTRACT FROM AUTHOR]

Selective adsorption of paraffins over olefins (mostly C2 and C3) by porous solids could offer tremendous advantages for the purification of olefins, which is, however, challenging as it has stringent requirements on the pore dimensions and pore surface chemistry of the adsorbent. We report here a metal-organic framework (MOF) with novel topology, Y3(μ3-OH)(TCMPB)2 (denoted as HIAM-316, TCMPB4− = 1,2,4,5-tetra(4-carboxy-3-methylphenyl)benzene), which shows reversed separation of C2H6/C2H4 and C3H8/C3H6 simultaneously. The ideal adsorbed solution theory (IAST) selectivities for equimolar binary mixtures of C2H6/C2H4 and C3H8/C3H6 were calculated to be 1.67 and 1.23 at 1 bar and 298 K for HIAM-316. Its capability of removing paraffines from paraffin/olefin mixtures is validated by breakthrough measurements. Molecular simulations reveal that the preferential adsorption of paraffins over olefins by HIAM-316 may be attributed to the abundant carboxylate oxygen atoms along its channel. [ABSTRACT FROM AUTHOR]

Purification of polymer‐grade (99.9%) C2H4 from C2 hydrocarbon mixture is industrially important but challenging. Cryogenic distillation is energy intensive. Recently, pressure/vacuum swing adsorption (P/VSA) processes using metal‐organic frameworks (MOFs) as adsorbents have been attracting increasing attention as an alternative technology. A multiscale hierarchical framework is proposed to select promising MOFs and design suitable P/VSA processes by combining property‐based material screening and model‐based process optimization. Using this framework, we successfully identified seven promising one‐step C2H4 purification MOFs that outperformed the benchmark TJT‐100 in both C2H4 purity and recovery for the 5/90/5 C2H2/C2H4/C2H6 feed mixture. Among them, OFUCAV exhibited the highest C2H4 productivity of 0.158 mol/m3/s while JAVTAC demonstrated the lowest energy consumption of 42.76 kWh/tonne. The latter can potentially save 80% of the energy consumption compared to cryogenic distillation. Moreover, these two P/VSA processes show very high robustness in response to composition fluctuations in the feed stream. [ABSTRACT FROM AUTHOR]

Interactions between lone pairs and aromatic π systems are significant across biology and self‐assembled materials. Herein, employing an achiral confinement metal–organic framework (MOF) encapsulates guest molecules, it is successfully realized that lone pair (lp)‐π interaction induces fluorescence "turn‐on" and circularly polarized luminescence for the first time. The MOFs synthesized based on naphthalenediimide show nearly non‐emissive, which can be light‐up by introducing acetone or ester guests containing lone pairs‐π interaction. Furthermore, the introduction of a series of lp‐rich chiral esters induces supramolecular chirality as well as circularly polarized luminescence in achiral MOFs, while also observing chiral adaptability. This work first demonstrates the luminescence and chiral induction via lone pair electrons‐π interactions, presenting a fresh paradigm for the advancement of chiroptical materials. [ABSTRACT FROM AUTHOR]

A d10 Cu(I) two‐dimensional (2D) metal–organic framework (MOF) with chemical formulas, {[Cd(L)(tcm)(H2O)]⋅2H2O}n (1) (L = 1,3,5‐tris(4‐pyridylethynyl)benzene; tcm−1 = tricyanomethanide) was synthesized and structurally characterized by single crystal X‐ray diffraction method. In 1, the coordination geometry of Cu(I) ion is distorted tetrahedral coordinated to four N atoms from three L and one tcm− ligands. A 2D puckered honeycomb‐like layer is formed via the bridges of Cu(I) ions and L ligands with tris‐monodentate coordination mode. Two 2D layers are mutually interpenetrated via the π–π stacking interaction between benzene ring of L ligand and pyridyl ring of neighboring L ligand to form a two‐fold interpenetrated 2D net and then arranged orderly to construct its 3D supramolecular network. Thermal stability and in‐situ temperature‐dependent structural variations of 1 are performed by TG analysis associated with temperature‐dependent PXRD measurement. The water vapor ad‐/de‐sorption isotherm and CO2 adsorption isotherm of 1 are measured and discussed. [ABSTRACT FROM AUTHOR]

ABSTRACT Instant and accurate detection of 3‐nitrotyrosine (3‐NT) biomarker is an important but challenging task in clinical diagnosis, treatment, and monitoring of diseases. Herein, this work reported a Zn (II)–based metal–organic framework (MOF) {[Zn2(BDPT)(DIMB)]}n, denoted as Zn‐BDPT, synthesized by solvothermal method using bis(3,5‐dicarboxyphenyl)terephthalamide (H4BDPT) and 1,4‐di(1H‐imidazol‐1‐yl)butane (DIMB). Neighboring [Zn (COO)2] clusters were connected by BDPT4− units and DIMB to form a (2,4,4)‐connected three‐dimensional (3D) architecture. X‐ray powder diffraction (PXRD) and thermogravimetric (TGA) experiments indicated that Zn‐BDPT had good purity and stability. Zn‐BDPT could selectively and rapidly recognize 3‐NT in an aqueous environment. For rapid economic detection of 3‐NT in actual samples, mixed‐matrix membranes (MMMs) based on Zn‐BDPT were successfully prepared and named Zn‐BDPT@PMMA. The addition of 3‐NT under the UV lamp displayed an evident visible fluorescence quenching effect. Quantitative titration analysis of Zn‐BDPT@PMMA in real serum sample obtained the Ksv value of 1.13 × 104 M−1 and a limit of detection (LOD) of 0.17 μM. This report demonstrated that MOF‐based MMMs could be used as ideal candidate for luminescent probe in actual application. [ABSTRACT FROM AUTHOR]

A new MOF, named UoC‐11 (UoC=University of Cologne, [Mg4(3F‐BTB)2(OAc)2(DMF)6] ⋅ DMF), based on a fluorinated BTB (4,4′,4′′‐benzene‐1,3,5‐triyl‐tris‐(benzoate)) derivative and Mg cations was synthesized incorporating additional acetate anions. Its crystal structure was determined from single crystal X‐ray diffraction data (P21/c, Z=4). It consists of one‐dimensional Mg‐SBUs (strands), interconnected perpendicularly by tritopic linkers forming a dense two‐fold interpenetrating 3D network. Thus, only very small voids are formed which are fully occupied by the solvent. After activation at 150 °C (24 hours), no meaningful N2 adsorption was observed. Compared to the Ca and Sr analogues UoC‐9, UoC‐11 does not exhibit a crystal sponge behaviour. Thermal analysis (TGA) shows a release of all solvent molecules up to ~280 °C and the decomposition of the framework starts above 300 °C. [ABSTRACT FROM AUTHOR]

2D functional porous frameworks offer a platform for studying the structure–activity relationships during electrocatalytic CO2 reduction reaction (CO2RR). Yet challenges still exist to breakthrough key limitations on site configuration (typical M−O4 or M−N4 units) and product selectivity (common CO2‐to‐CO conversion). Herein, a novel 2D metal–organic framework (MOF) with planar asymmetric N/O mixed coordinated Cu−N1O3 unit is constructed, labeled as BIT‐119. When applied to CO2RR, BIT‐119 could reach a CO2‐to‐C2 conversion with C2 partial current density ranging from 36.9 to 165.0 mA cm−2 in flow cell. Compared to the typical symmetric Cu−O4 units, asymmetric Cu−N1O3 units lead to the re‐distribution of local electron structure, regulating the adsorption strength of several key adsorbates and the following catalytic selectivity. From experimental and theoretical analyses, Cu−N1O3 sites could simultaneously couple the atop‐type (on Cu site) and bridge‐type (on Cu−N site) adsorption of *C1 species to reach the CO2‐to‐C2 conversion. This work broadens the feasible C−C coupling mechanism on 2D functional porous frameworks. [ABSTRACT FROM AUTHOR]

Developing an anode material that has better performance efficiency than commercial graphite while keeping the features of economic scalability and environmental safety is highly desirable yet challenging. MOFs are a promising addition to the ongoing efforts, however, the relatively poor performance, chemical instability, and large‐scale economic production of efficiency‐proven pristine MOFs restrict their utility in real‐life energy storage applications. Furthermore, hierarchical porosity for lucid mass diffusion, high‐density lithiophilic sites are some of the structural parameters for improving the electrode performance. Herein, we have demonstrated the potential of economically scalable salicylaldehydate 3D‐conjugated‐MOF (Fe−Tp) as a high‐performance anode in Li‐ion batteries: the anode‐specific capacity achieved up to 1447 mAh g−1 at 0.1 A g−1 and 89 % of cyclic stability after 500 cycles at 1.0 A g−1 for pristine MOF. More importantly, incorporating 10 % Fe−Tp doping in commercial graphite (MOFite) significantly enhanced lithium storage, doubling capacity after 400 cycles. It signifies the potential practical utility of Fe−Tp as a performance booster for commercial anode material. [ABSTRACT FROM AUTHOR]

Developing biodegradable electrodes is a significant step toward environmental sustainability and cost reduction in battery technology. This paper presents a new approach that utilizes metal‐organic framework (MOF)‐encapsulated silicon nanoparticles (SiNPs) as the active anode material within a cellulose‐based electrode. The electrode is free‐standing, flexible, biodegradable, and significantly reduces the strain experienced by SiNPs during volume expansion, resulting in improved capacity and cycle life stability of SiNPs. The high porosity of the electrode creates efficient lithium (Li+) ion transport channels and enhances electrolyte absorption, thus promoting effective contact between the electrolyte and active material. The outcome is rapid electrode kinetics and a highly reversible discharge capacity of 1744.6 mAh g−1 at 0.5 A g−1 versus Li/Li+ over 1000 cycles. Further, full cell tests are conducted that demonstrate a stable cycle performance exceeding 3400 cycles, with an initial discharge capacity retention of 80.5% at 0.5 A g−1. By employing cellulose and avoiding toxic organic solvents and binders, the proposed approach is promising for a substantial reduction of the production costs of Li‐ion batteries. The scalability of the proposed method further enhances its practical viability, offering intriguing economic implications for the future of battery technology. [ABSTRACT FROM AUTHOR]

The controllable formation of a built‐in electric field (IEF) can effectively separate photogenerated electrons and holes and optimize the band structure of a material, thus improving its photocatalytic performance. Here, a novel type of defective metal‐organic framework (MOF), i.e., an MIL‐125(Ti)@Ti‐Ce‐MOF yolk‐shell Z‐scheme heterojunction, is synthesized using a simple ion‐etching‐coupled reconstruction method. By controlling the concentration of ligand defects within the MOF heterojunction, the strength of the IEF within the heterojunction can be effectively regulated. Moreover, the experimental and theoretical results demonstrated that ligand defects within the Z‐scheme heterojunction structure can enhance the efficiency of photogenerated carrier separation and improve the transport capacity by regulating the IEF. The photocatalytic tetracycline (TC) degradation performance of the resultant MIL‐125(Ti)@Ti‐Ce‐MOF yolk‐shell heterojunction is ≈52.5‐ and 5.5‐fold higher than those of Ti‐Ce‐MOF and MIL‐125(Ti), respectively, indicating the efficient spatial charge separation due to the enhanced IEF. This study reveals the precise control of the IEF over the MIL‐125(Ti)@Ti‐Ce‐MOF yolk‐shell Z‐scheme heterojunction, elucidating the relationship between the IEF and ligand defect concentration and promoting the photocatalytic performances of MOF@MOF‐based catalysts via density functional theory and related experiments. [ABSTRACT FROM AUTHOR]

Supercapacitors offer superior energy storage capabilities than traditional capacitors, making them useful for applications such as electric vehicles and rapid large‐scale energy storage. The energy storage performance of these devices relies on electrical double‐layer capacitance and/or pseudocapacitance from rapid reversible redox reactions. Metal–organic frameworks (MOFs) have recently emerged as a new class of electrode materials with promising supercapacitor performances and capacitances that exceed those of traditional materials. However, the comparison of the supercapacitor performance of a porous carbon and a state‐of‐the‐art MOF highlights a number of challenges for MOF supercapacitors, including low potential windows, limited cycle lifetimes, and poor rate performances. It is proposed that the well‐defined and tuneable chemical structures of MOFs present a number of avenues for improving supercapacitor performance. Recent experimental and theoretical work on charging mechanisms in MOF‐based supercapacitors is also discussed, and it is found that there is a need for more studies that elucidate the charge storage and degradation mechanisms. Ultimately, a deeper understanding will lead to design principles for realizing improved supercapacitor energy storage devices. [ABSTRACT FROM AUTHOR]

Metal‐organic frameworks (MOFs), an emerging class of porous crystalline material, are identified as a promising candidate for tackling the most formidable global challenges due to their unique and intriguing properties including well‐defined porous crystal structure, large specific surface area, and vast tunable chemical and physical property. Air pollution resulting from various toxic gases, volatile organic compounds, and fine particulate matters has posed a big threat to human health and ecological sustainability. In recent years, various MOFs are studied and shown great potential as active materials for air pollution control in both pollutant detection and air quality remediation. In this review, the most recent research progress for MOFs‐based materials for air pollution control is summarized. The discussion is categorized based on the different approaches for air quality control with a focus on the performance correlations to the structure and functionality of MOFs. In addition, the technical merits and downsides of each approach are discussed based on their application scenarios. Finally, the remaining challenges and future research directions in this field are proposed. [ABSTRACT FROM AUTHOR]

Catalytic ethylene oligomerization is important in the petrochemical industry, as it produces valuable products like linear alpha‐olefins (LAOs) for the synthesis of polymers and specialty chemicals. Catalysts, typically transition metal complexes or metal‐containing materials, play a crucial role in selective oligomerization by providing active sites for ethylene activation and controlling product distribution. Recently, defective metal‐organic frameworks (MOFs) with well‐defined structures and unsaturated active sites have emerged as potential catalysts for ethylene oligomerization. In this study, we employ density functional theory calculations to investigate the energetic selectivity of competing pathways (including dimerization, isomerization and trimerization) during ethylene oligomerization on defective HKUST‐1 supported metal hydrides (H−M–DHKUST‐1, M: Co, Ni, Ru, Rh and Pd). On all the five hydrides, ethylene dimerization is found to be more preferential than trimerization and isomerization. In the microenvironment of defective paddlewheel of HKUST‐1, isomerization is highly unfavorable compared with dimerization because of high energy required for chain walk, and 1‐butene is expected to be the major product on all the five hydrides. Analysis of NBO charges reveals a notable reduction in cationic nature at the metal site on H−Ru–DHKUST‐1, which facilitates β‐hydride elimination for dimerization. The microscopic insights from this computational study might facilitate the rational design of new MOFs and other MOF‐supported catalysts for selective ethylene oligomerization. [ABSTRACT FROM AUTHOR]

The electrochemical regeneration of reduced nicotinamide adenine dinucleotide (NADH) using [Rh(Cp*)(bpy)Cl]+ holds significant promise for the industrial synthesis of chiral chemicals. However, challenges persist due to the high consumption of NADH and the limited efficiency of its cyclic regeneration, which currently hinder widespread application. To address these obstacles, based on in‐situ growth of 3D ordered metal‐organic framework (NU‐1000) on the surface of graphite felt, [Rh(Cp*)(bpy)Cl]+ were immobilized on the Zr6 nodes of NU‐1000 by solvent‐assisted ligand incorporation (SALI), and applied in a flow bioreactor. Moreover, we employ a gas diffusion electrode (GDE) to oxidize H2, providing a clean proton source for the electrochemical regeneration of NADH. Consequently, highly efficient enzymatic electrocatalytic synthesis of L‐lactate was achieved when coupled with L‐lactate dehydrogenases (LDH) as a model reaction, and the total turnover number (TTN) reached 19600 and 1750 for [Rh(Cp*)(bpy)Cl]+ and NAD+ after 48 h, corresponding to a high turnover frequency (TOF) of 2350 h−1 and 210 h−1 for [Rh(Cp*)(bpy)Cl]+ and NAD+, respectively. This work provides new insights for the construction of efficient enzymatic electrosynthesis systems in industrial production. [ABSTRACT FROM AUTHOR]

Development of new multi‐ratiometric fluorescence probes has been a popular research field. This approach provides richer and more accurate information for the recognition of different substances which have similar chemical and physical properties. In this work, a ratiometric fluorescence sensor UIO‐66⊃FL/RhB is successfully constructed by incorporating fluorescein (FL) and rhodamine B (RhB) to the UIO‐66. With the addition of fluoroquinolones (FQs), the prepared UIO‐66⊃FL/RhB sensor can be used for the 2D emission‐fingerprint map, the linear discriminant analysis (LDA) and hierarchical clustering analysis (HCA) in recognition the presence of each FQs. The fluorescence probe offers a broad linear range (0‐8 µM) and a low detection limit (3.7 nM) in sensing ofloxacin. In addition, a smartphone‐assisted portable sensing platform and a portable UIO‐66⊃FL/RhB hydrogel test material are constructed successfully for screening before fluorescence detection. This study proposes a novel multi‐ratiometric fluorescence probe, which can recognize different FQs. Besides, the UIO‐66⊃FL/RhB‐based hydrogel beads are construction for screening before the detection of FQs, which established a promising strategy for the simple and accurate discrimination of FQs. [ABSTRACT FROM AUTHOR]

A membrane with a low methanol permeability and high proton conductivity (σ p) is essential for the effective operation of a direct methanol-based fuel cell. Herein, a bio-metal organic framework was prepared with natural α-amino acids as ligands and then combined with hydrolyzed polyacrylonitrile (PAN) nanofibers (AA-MOF@PAN). The resulting nanocomposite membranes were subsequently integrated into a Nafion matrix (AA-MOF@PAN/Nafion). The –NH 2 groups on AA-MOF@PAN interact with –SO 3 H groups on Nafion, forming long-range acid-base pairs along the interface between the matrix and nanofibers. This interaction creates abundant proton-conducting sites for proton exchange membrane. Notably, the AA-MOF@PAN-4h/Nafion membrane demonstrated an exceptional proton conductivity (σ p) of 0.25 S cm−1 and a higher power density of 117.61 mW cm−2 compared to the recast Nafion membrane. This study offers valuable insights into the three-dimensional ordered design of a natural α-amino acids as a proton transfer sites and highlighting their potential applications in proton exchange membranes. • In situ growth of uniformly distributed AA-MOF onto hydrolyzed PAN nanofiber. • AA-MOF@PAN were introduced as proton-conducting channels. • AA-MOF@PAN-4h/Nafion exhibited the highest proton conductivity of 0.25 S cm−1 at 80 °C. • Introduction of AA-MOF@PAN resulted in a reduced fuel crossover. [ABSTRACT FROM AUTHOR]

Supercapacitors (SCs) have the unique ability to rapidly recharge while providing substantial power output. Metal‐organic frameworks (MOFs) are emerging as promising electrode materials for SCs due to their high porosity, ease of synthesis, tunable pore size distribution, and exceptional structural adaptability. This study presents a facile and cost‐effective method, namely, laser ablation synthesis in solution (LASiS), for the synthesis of bimetallic MOFs composited with reduced graphene oxide (rGO), namely, ZnCo bi‐MOF‐rGO hybrid nanocomposite (HNC). Comprehensive analyses demonstrate that ZnCo bi‐MOF‐rGO has a high specific capacitance of 1092 F g−1 at 1.0 A g−1 in a 0.5 M Na3SO4 electrolyte. In addition, these bi‐MOF‐rGO composites have been successfully integrated with appropriate solvents, viscosity modifiers, in‐house synthesized porous carbon (PC), commercially available graphene, and binders into an active layer ink material for the development of high‐performance 3D printed SCs via sequential inkjet printing. To that end, the way has been paved for the incorporation of this class of material into energy storage applications, particularly in the fabrication of high‐performance printed electronics using laser‐induced materials. [ABSTRACT FROM AUTHOR]

The construction of near‐infrared (NIR) light‐activated hydrogen‐producing materials that enable the controlled generation and high‐concentration release of hydrogen molecules in deep tumor tissues and enhance the effects of hydrogen therapy holds significant scientific importance. To address the key technical challenge of low‐efficiency oxidation–reduction reactions for narrow‐bandgap photocatalytic materials, this work proposes an innovative approach for the controllable fabrication of multiphoton photocatalytic materials to overcome the limitations imposed by traditional near‐infrared photocatalysts with "narrow‐bandgap" constraints. Herein, an NIR‐responsive multiphoton photocatalyst, ZrTc‐Co, is developed by utilizing a post‐synthetic coordination modification strategy to introduce hydrogenation active site CoII into a multiphoton responsive MOF (ZrTc). The results reveal that with the introduction of the CoII site, electron–hole recombination can be efficiently suppressed, thus promoting the efficiency of hydrogen evolution reaction. In addition, the integration of CoII can effectively enhance charge transfer and improve static hyperpolarizability, which endows ZrTc‐Co with excellent multiphoton absorption. Moreover, hyaluronic acid modification endows ZrTc‐Co with cancer cell‐specific targeting characteristics, laying the foundation for tumor‐specific elimination. Collectively, the proposed findings present a strategy for constructing NIR‐II light‐mediated hydrogen therapeutic agents for deep tumor elimination. [ABSTRACT FROM AUTHOR]

Metal‐organic frameworks (MOFs) are porous materials with numerous chemical and structural possibilities. Due to their ease of modification, well‐organized structure, and diverse guest molecule chemistry, MOFs are ideal platforms for uncovering improved functional material design characteristics. Quantitative analysis of glucose is crucial, especially in some food products, for quality control as well as evaluation of the glucose levels helps diagnose and treat diabetes. Recent glucose sensing devices have relied heavily on MOFs and other nanomaterials to enable user‐friendly and safe non‐invasive sensing methods. Nevertheless, the conventional synthesis methods involve multi‐day reactions, cooling, and depressurization processes. This study demonstrates the unprecedented high‐power laser‐induced rapid synthesis (LIRS) of Ni‐based MOF nanospheres with interconnected nano‐rods and noncentrosymmetric primitive triclinic crystalline structure, highlighting their multifunctional usage in sensing and gas sorption applications. Ab initio simulations show excellent agreement with the experimental physical and gas sorption properties. Furthermore, the Ni‐MOF‐based biosensor accurately measures glucose real‐life beverage samples, yielding promising glucose detection biosensor results with a low limit of the detection (LOD) of 13.96 µM and high sensitivity of 120.606 µA mM−1 cm−2. [ABSTRACT FROM AUTHOR]

Electrosynthesis of urea from CO2 and NO3− is a sustainable alternative to energy‐intensive industrial processes. The main challenge hindering the progress of this technology lies in the development of advanced electrocatalysts that efficiently utilize abundant, low‐cost CO2 and nitrogen sources to yield urea with both high Faradaic efficiency (FE) and current density. In this work, we designed and prepared a new two‐dimensional metal–organic framework (MOF), namely PcNi−Fe−O, constructed by nickel‐phthalocyanine (NiPc) ligands and square‐planar FeO4 nodes, as the electrocatalyst for urea electrosynthesis. PcNi−Fe−O exhibits remarkable performance to yield urea at a high current density of 10.1 mA cm−2 with a high FE(urea) of 54.1 % in a neutral aqueous solution, surpassing those of most reported electrocatalysts. No obvious performance degradation was observed over 20 hours of continuous operation at the current density of 10.1 mA cm−2. By expanding the electrode area to 25 cm2 and operating for 8 hours, we obtained 0.164 g of high‐purity urea, underscoring its potential for industrial applications. Mechanism study unveiled the enhanced performance might be ascribed to the synergistic interaction between NiPc and FeO4 sites. Specifically, NH3 produced at the FeO4 site can efficiently migrate and couple with the *NHCOOH intermediate adsorbed on the urea‐producing site (NiPc). This synergistic effect results in a lower energy barrier for C−N bond formation than those of the reported catalysts with single active sites. [ABSTRACT FROM AUTHOR]

The wrinkles are pervasive in ultrathin two‐dimensional (2D) materials, but the regulation of wrinkles is rarely explored systematically. Here, we employed a series of carboxylic acids (from formic acid to octanoic acid) to control the wrinkles of Zr‐BTB (BTB=1, 3, 5‐(4‐carboxylphenyl)‐benzene) metal–organic framework (MOF) nanosheet. The wrinkles at the micrometer scale were observed with transmission electron microscopy. Furthermore, high‐angle annular dark‐field (HAADF) images showed lattice distortion in many nanoscale regions, which was precisely matched to the nano‐wrinkles. With the changes of hydrophilicity/hydrophobicity, MOF‐MOF and MOF‐solvent interactions were possibly synergistically regulated and wrinkles with different sizes were obtained, which was supported by HAADF, molecular dynamics, and density functional theory calculation. Different wrinkle sizes resulted in different pore sizes between the Zr‐BTB nanosheet interlayers, providing highly‐oriented thin films and the successive optimization of kinetic diffusion pathways, proved by grazing‐incidence wide‐angle X‐ray scattering and nitrogen adsorption. The most suitable wrinkle pore from Zr‐BTB‐C4 exhibited highly efficient chromatographic separation of the substituted benzene isomers. Our work provides a rational route for the modulation of nanoscale wrinkles and their stacked pores of MOF nanosheets and improves the separation abilities of MOFs. [ABSTRACT FROM AUTHOR]

Mixed matrix membranes (MMMs), an important class of organic-inorganic nanocomposite membranes, were developed to overcome some of the limitations of purely polymeric membranes. In this study to improve the separation performance of polyvinyl chloride (PVC) membranes, mixed matrix membranes (MMMs) were prepared from incorporating choline prolinate based ionic liquid (IL) in a the coke/metal-organic framework (MOF) (NH2-MIL-101(Cr)) as a filler in polyvinyl chloride (PVC), which can be viewed as a potential solution to the trade-off problem with polymeric membranes because of the combination of the processing versatility of polymers and the high gas separation capability. Coke/MOF/PVC and IL@AC/MOF/PVC MMMs with different filler loadings of 5, 10, and 15 wt% were prepared using solution casting method and characterized using Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM) with Energy-Dispersive X-ray Spectroscopy (EDX) analyses, and Brunauer-Emmett-Teller (BET) surface area test. The porous structure of MMMs nanocomposites causes to which coke/MOF composite effectively accelerate gas diffusion in the PVC matrix. The permeability date was measured at 288.15, 298.15, 308.15 and 318.15 K and pressure up to 4 bar for CO2 and N2. According to the outcome, the addition of the IL([Cho][Pro]) filler, the permeability of the AC/MOF/PVC MMMs is increased compared to the pure PVC membrane. The MMMs have the highest gas separation efficiency and performance above Robson's Upper Bound from 2008. [ABSTRACT FROM AUTHOR]

ABSTRACT A copper‐based one‐dimensional framework compound [Cu2(L1)4(L2)]n (1) [L1 = 3‐(2‐thienyl)acrylic acid, L2 = 4,4′‐bipyridine] has been synthesized by slow diffusion of layers technique and characterized by spectroscopic methods and single‐crystal X‐ray crystallography. X‐ray diffraction analysis reveals that the compound is crystallized in the triclinic crystal system with space group Pī. Two neighboring Cu centers are bridged by four carboxylato groups from four different L1 ligands, leading to the formation of a paddle‐wheel [Cu2(COO−)4] secondary building unit (SBU). The paddle‐wheel units are interconnected by bidentate 4,4′‐bipyridine ligands to form a one‐dimensional infinite chain network. In [Cu2(L1)4(L2)]n (1), Cu(II) ion features a penta‐coordinated environment around it. Notably, [Cu2(L1)4(L2)]n (1) is capable of activating molecular oxygen to efficiently catalyze the oxidation of alcohols under base‐free conditions. [ABSTRACT FROM AUTHOR]

The slow kinetics of four-electron-transfer oxygen evolution reaction (OER) highly impedes the conversion efficiency of overall water splitting for green hydrogen production. Recently, metal-organic frameworks (MOFs) have attracted widespread attention due to their tunable morphologies, well-defined structures, and abundant metal sites. In this work, a series of cobalt-incorporated NiFe-MOF nanosheets were in-situ synthesized on nickel foam. Owing to the synergistic effect of exposed multi-metal sites, NiFeCo-BDC exhibits excellent OER activity, delivering an ultralow overpotential of 233 mV at the current density of 10 mA cm−2 with a small Tafel slope of 40.8 mV dec−1. In the continuous chronoamperometry test at 100 mA cm−2, almost no potential attenuation can be found over 200 h, demonstrating its remarkable stability. After OER, the amorphous metal oxyhydroxide layer is generated on surface, and the high-valent species are responsible for the superior OER performance. In-situ Raman spectra reveal that the organic ligands of NiFe-BDC and NiFeCo-BDC are etched and released during OER, and the Co incorporation facilitates the generation of amorphous layer. This work presents an effective strategy for design of multi-metal MOF-based electrocatalysts, and provides an insightful view on the structure evolution during OER. [Display omitted] • Construction of self-supported trimetallic NiFeCo-BDC nanoarrays. • Superior OER performance with ultra-low overpotential and excellent stability. • In-situ Raman studies on deciphering the self-reconstruction process. [ABSTRACT FROM AUTHOR]

We present the design of a novel functional metal-organic framework here, denoted as Co-sal–NH 2 –MOF@TiO 2 , featuring the comprise of controllably in-situ grown TiO 2 sheets from NH 2 -MOF(Ti) and [Co] catalytic sites stabilized by salicylaldimine moiety via site isolation for visible-light-driven hydrogen evolution from water. The hierarchical organization of TiO 2 and Co catalyst within NH 2 -MOF (Ti) leads to outstanding photocatalytic performance, as evidenced by a H 2 yield of 15,584 μmolg−1h−1 and turnover numbers (TON) reaching 5844 over 24 h. This catalyst also signifies distinctly enhanced activities of approximately 105-fold, 354-fold, 15-fold, and 100-fold, compared to the pristine NH 2 -MOF(Ti), MOF-derived TiO 2 , NH 2 -MOF(Ti)@TiO 2 and the combination of [Co catalyst + NH 2 -MOF(Ti) + TiO 2 ], respectively. EXAFs and XPS etc. analyses revealed a stable coordination environment for salicylaldimine-supported Co(II) catalytic unit, which integrated with in-situ grown TiO 2 sheets can not only guarantee catalyst stability, but also generate much more densely packed light-harvesting heterojunction units and thus promote separation and transfer of photogenerated carriers between TiO 2 and Co catalyst in NH 2 -MOF(Ti) under light through optimized band gap structure. This work outlines the in-situ construction of organic and inorganic hybrid heterojunction for H 2 production from water. The novel organic and inorganic hybrid heterojunction that [Co] catalytic sites stabilized by salicylaldimine moiety with in-situ derived TiO 2 sheets from MOF(Ti) to realize further promoted visible light-driven H 2 formation. [Display omitted] • Salicylaldimine-supported Co and in-situ derived TiO 2 were integrated into NH 2 -MOF(Ti). • Co-sal–NH 2 –MOF@TiO 2 represented 105-fold enhanced H 2 evolution rate over pristine MOF. • EXAFs and XPS revealed stable coordination environment of Sal-Co and charge transfer pathway. • Synergistic effect between TiO 2 and Co in MOF endow high stability and mobility of charge carriers. [ABSTRACT FROM AUTHOR]

In this work, a series of Ni‐WxC/carbon materials have been prepared from a MOF precursor, DUT‐8(Ni), following different tungsten deposition routes. After pyrolysis, nickel‐tungsten alloys and tungsten carbide phases over nitrogen‐doped carbons were obtained. These materials were applied to cellulose hydrogenolysis, where molar yields of up to 46 % in ethylene glycol (EG) and 9 % in propylene glycol (PG) were obtained at 245 °C after 1 hour of reaction time. The best performing catalyst demonstrated promising stability, as the EG yield remained constant over 3 recycling tests and very little nanoparticles sintering was observed. [ABSTRACT FROM AUTHOR]

Separating propylene (C3H6) from propylene/propane (C3H6/C3H8) mixture using energy‐efficient adsorption is industrially important, but due to the lack of universal pore features, the rational selection of a suitable adsorbent in the ocean of porous materials is a tough task. In this study, a comprehensive work on the discovery of high‐performance C3H6/C3H8 separation adsorbents is carried out by utilizing the advantages of high‐throughput computational screening (HTCS). First, based on the HTCS data mining in the CoRE MOF 2019 and Tobacco 3.0 database, the target material, Cd‐HFDPA, is screened out. Second, the pore electrostatic potential (ESP) analysis shows that Cd‐HFDPA has obvious pore characteristics and high affinity for C3H6 according to ESP matching, which is further confirmed by adsorption isotherms, Ideal Adsorbed Solution Theory selectivity, adsorption enthalpy analyses, and breakthrough experiments. Finally, an industrial two‐bed pressure swing adsorption process for Cd‐HFDPA adsorbent is proposed and its productivity and energy consumption are compared with other benchmark materials. [ABSTRACT FROM AUTHOR]

This study synthesized NiAl-layered double hydroxide (LDH)/Cu-MOF photocatalyst using a simple impregnation method involving NiAl-LDH and Cu-MOF. The successful synthesis was confirmed through Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), zeta potential measurements, thermogravimetric analysis (TGA), ultraviolet diffuse reflectance spectroscopy (UV-DRS), N2 adsorption at −196 °C, and electrochemical impedance spectroscopy (EIS). Photocatalysts based on NiAl-LDH, Cu-MOF, and NiAl-LDH/Cu-MOF were used to remove methyl orange (MO) dye from contaminated water. The impact of various factors, including pH, dye concentration, and photocatalyst amount, on MO degradation efficiency was assessed. FTIR analysis was conducted both before and after dye degradation. The optimal degradation conditions were a photocatalyst dose of 25 mg and a pH of 3. Kinetic studies indicated that the degradation of MO dye onto NiAl-LDH/Cu-MOF followed a pseudo-first-order and an L–H or Langmuir–Hinshelwood model. The value of R2 = 0.94 confirms the validity of pseudo-first-order and Langmuir–Hinshelwood (L–H) kinetic models for the photocatalytic degradation of MO dye. This study highlights the importance of developing novel photocatalysts with improved degradation efficiency to protect the water environment. Antibacterial activity was also performed with antibacterial sensibility testing by disk diffusion to determine minimal inhibitory and bactericidal concentrations. In short, NiAl-LDH/Cu-MOF can be helpful for various biomedical and industrial applications. [ABSTRACT FROM AUTHOR]

A bilayer MOF reporter (ZIF-67@FAM-mRNA@ZIF-8) was synthesized, and the ZIF-67 was used as a carrier and fluorescent quencher to connect the FAM reporter through electrostatic adsorption and coordination effect. The ZIF-8 covering the outer layer can improve the stability of the probe and cell permeability, which helps the FAM reporter effectively release. After entering the cancer cells, the acidic environment in the cells induced the decomposition of ZIF-8. The excess ATP in the tumor cells competitively binds ZIF-67, causing the FAM reporter to shed and restore fluorescence. The shed FAM reporter was specifically bound to the overexpressed miRNA-21 in breast cancer cells to achieve fluorescence imaging and therapy of breast cancer. The results of specific imaging and apoptosis experiments of breast cancer cells indicate that bilayer MOF nanomachine provides an effective nanotherapy platform for accurate fluorescence imaging. [ABSTRACT FROM AUTHOR]

This overview provides insights into organic and metal–organic polymer (OMOP) catalysts aimed at processes carried out in the liquid phase. Various types of polymers are discussed, including vinyl (various functional poly(styrene-co-divinylbenzene) and perfluorinated functionalized hydrocarbons, e.g., Nafion), condensation (polyesters, -amides, -anilines, -imides), and additional (polyurethanes, and polyureas, polybenzimidazoles, polyporphyrins), prepared from organometal monomers. Covalent organic frameworks (COFs), metal–organic frameworks (MOFs), and their composites represent a significant class of OMOP catalysts. Following this, the preparation, characterization, and application of dispersed metal catalysts are discussed. Key catalytic processes such as alkylation—used in large-scale applications like the production of alkyl-tert-butyl ether and bisphenol A—as well as reduction, oxidation, and other reactions, are highlighted. The versatile properties of COFs and MOFs, including well-defined nanometer-scale pores, large surface areas, and excellent chemisorption capabilities, make them highly promising for chemical, electrochemical, and photocatalytic applications. Particular emphasis is placed on their potential for CO2 treatment. However, a notable drawback of COF- and MOF-based catalysts is their relatively low stability in both alkaline and acidic environments, as well as their high cost. A special part is devoted to deactivation and the disposal of the used/deactivated catalysts, emphasizing the importance of separating heavy metals from catalysts. The conclusion provides guidance on selecting and developing OMOP-based catalysts. [ABSTRACT FROM AUTHOR]

6-thioguanine (6-TG) is an antimetabolite drug of purine structure, approved by the FDA for the treatment of acute myeloid lesukemia, and it is of interest in treating other diseases. The interaction of drugs with matrices is of interest to achieving a delayed, sustained, and local release. The interaction of 6-TG with an aluminum metal–organic framework (Al-MOF) DUT-4 is studied using a novel experimental approach, namely, mechano-chemistry by liquid-assisted grinding (LAG). The bonding of 6-TG to the DUT-4 matrix in the composite (6-TG)(DUT-4) was studied using ATR-FTIR spectroscopy and XRD. This interaction involves amino groups and C and N atoms of the heterocyclic ring of 6-TG, as well as the carboxylate COO− and (Al)O-H groups of the matrix, indicating the formation of the complex. Next, an in vitro delayed release of 6-TG was studied from composite powder versus pure 6-TG in phosphate buffered saline (PBS) at 37 °C. Herein, an automated drug dissolution apparatus with an autosampler was utilized, and the molar concentration of the released 6-TG was determined using an HPLC–UV analysis. Pure 6-TG shows a quick (<300 min) dissolution, while the composite gives the dissolution of non-bonded 6-TG, followed by a significantly (factor 6) slower release of the bonded drug. Each step of the release follows the kinetic pseudo-first-order rate law with distinct rate constants. Then, a pharmaceutical shaped body was prepared from the composite, and it yields a significantly delayed release of 6-TG for up to 10 days; a sustained release is observed with the 6-TG concentration being within the therapeutically relevant window. Finally, the composite shows a time-dependent (up to 9 days) stronger inhibition of leukemia MV-4-11 cell colonies than 6-TG. [ABSTRACT FROM AUTHOR]

A sensitive analytical procedure for simultaneous extraction and determination of bisphenol A and alkyl phenols, namely, 4‐sec‐butylphenol, 4‐tert‐butylphenol, and 4‐tert‐amylphenol from aqueous samples with metal–organic framework (MOF)‐based dispersive micro‐solid‐phase extraction (D‐µSPE) and high‐performance liquid chromatography (HPLC) technique is developed. Sample contaminants were preconcentrated with amino‐functionalized aluminum MOF and later eluted with acetonitrile. The reconstituted sample was subjected to HPLC analysis. Various procedural parameters related to D‐µSPE were optimized. Under optimized preconcentration and chromatographic conditions, calibration curves with excellent linearity (R2 > 0.9986) in the working range of 0.25–100 ng mL−1 were prepared. Limit of detection (S/N = 3) for every analyte within the range of 0.020–0.022 ng mL−1 was obtained. Analyte's recovery 91.16%–97.01% (RSD = 1.02–3.01) for intraday and 89.86%–95.83% (RSD = 1.15–3.13) for inter‐day analysis was obtained from real water samples. [ABSTRACT FROM AUTHOR]

Research concerning coordination polymers has been intense due to their significant variability and structural stability. With this in mind, an ionic neodymium coordination polymer was synthesized, composed of an anionic one‐dimensional polymer interconnected to a cationic three‐dimensional porous polymer, poly[dodecaaquabis(μ‐pyridine‐4‐carbohydrazide‐κ2N:O)bis(μ2‐4‐sulfobenzoato‐κ2O:O′)bis(μ3‐4‐sulfobenzoato‐κ3O:O′:O′′)trineodymium(III)] catena‐poly[aquabis(μ‐pyridine‐4‐carbohydrazide‐κ2N:O)bis(μ2‐4‐sulfobenzoato‐κ2O:O′)neodymium(III)] 4.33‐hydrate, {[Nd3(C7H4O5S)4(C6H7N3O)2(H2O)12][Nd(C7H4O5S)2(C6H7N3O)2(H2O)]·4.33H2O}n. The ligands used were 4‐sulfobenzoate (PSB) and pyridine‐4‐carbohydrazide, popularly known as isoniazid (INH), an antibiotic drug. The compound crystallizes in the monoclinic space group C2/c, with Z = 4. Solid‐state calculations suggest that the crystal structure is mainly stabilized by hydrogen bonds, i.e. O—H...O and N—H...O interactions among the polymers, and by van der Waals interactions involving the organic side chains. This net is tetragonal, 2‐nodal 3,4‐connected, and can be described as the dmd (sqc 528) type. [ABSTRACT FROM AUTHOR]

Although metal‐organic frameworks (MOFs) show promise as electrocatalysts due to their unique intrinsic features, their activity and stability often fall short. Herein, NiFe‐MOFs is used as a model to introduce group VIB metalates (Na2WO4, Na2CrO4, and Na2MoO4) into the topological conversion process of layer double hydroxide (LDHs)/MOFs, creating a series of interstitial VIB element‐doped LDHs/MOFs catalysts. The metalates engage in the alkaline hydrolysis process of MOF, generating LDHs on the MOF surface. Furthermore, altering the pH value in the reaction environment can modify the catalysts' morphology, dopant/LDHs content, and electronic structure. Consequently, the prepared interstitial W‐doped NiFe‐LDHs/MOFs catalyst displays superior catalytic performance, with overpotentials of only 250 mV at 500 mA cm−2. Moreover, a homemade anion‐exchange membrane water electrolysis (AEMWE) system featuring the fabricated electrocatalyst as the anode can operate stably for 500 hours at 1 A cm−2. The exceptional catalytic activity and stability stem from optimized intermediate adsorption/desorption behavior and the unique LDHs/MOFs nanostructure. This work not only highlights the potential of the catalysts for practical applications but also offers a new design approach for modulating MOFs using an alkaline hydrolysis strategy. [ABSTRACT FROM AUTHOR]

The dissolution/shuttling of sodium polysulfides, coupled with sodium dendrites growth, severely compromises the lifespan and stability of room temperature sodium–sulfur (RT Na–S) batteries. Herein, it proposes employing a functionalized porous ZIF‐based membrane (PZM) to address these two challenges. First, the metal ions embedded within the zeolitic imidazolate framework chemically bind with polysulfide anions, curtailing their detrimental shuttling. Second, the tailored porous structure of the membrane ensures a selective and uniform pathway for sodium ions, significantly reducing non‐uniform deposition and curbing dendritic sodium growth. Third, the intrinsically non‐combustible nature of the ZIF‐based membrane acts as a fortification against thermal outbursts and electrolyte decomposition. Implementing this polysulfide‐resistant, dendrite‐inhibiting and flame‐retardant PZM with a standard S/C cathode leads to the creation of a robust separator with lean electrolyte RT Na–S battery. This configuration may impart a novel perspective for the advancement and enhancement of RT Na–S battery systems. [ABSTRACT FROM AUTHOR]

The stainless steel mesh was covered by MOF-199 and applied in the four-component synthesis of 2-aminospiro[indeno[1,2-b]quinoxalin-11,4-pyran]-3-carbonitriles as a novel and efficient heterogeneous catalyst. The preparation of MOF-199-covered stainless steel mesh (MOF-199@SSM) was confirmed by FT-IR, FE-SEM and DEX analyses. MOF-199@SSM catalyst can be easily separated from the reaction mixture by simple forceps and reused. The stability of the catalyst was examined using a hot filtration test and no leaching occurred during the reaction. The reactions conditions were mild and the reaction times were relatively short. No by-product was produced, so, high purity and high yields of products were obtained. [ABSTRACT FROM AUTHOR]

An interseting Cu(II)-based organic framework containing a Cu2O5 cluster, [Cu (TBA)(CH3OH)]n (1) has been hydrothermally synthesized with tetrabromoterephthalate (H2TBA) ligand, and characterized through infrared spectroscopy (IR), elemental and thermal analysis (EA), power X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD) analyses. The X-ray single-crystal diffraction analysis shows that the CuII center is hexa-coordinated and situated on perfect octahedral geometry formed by four carboxyl oxygen atoms of four symmetry-related TBA2− anions and two O-donors of two reverse µ2-CH3OH bridges. Each TBA2− ligand plays as a µ4 tetra-monodentate linker and connect four Cu2+ cations together to form the three dimensional structure of 1. Surprisingly, there are no significant hydrogen bonds and π-stack interactions in 1, but the Br···Br halogen bonds interactions. Detailed topology analysis found that the 3D cluster-based metal-organic framework of 1 can be simplified to 4 topological types: a 4-c 1-nodal net dia with point symbol {66}, a 6,6-c 2-nodal net htp with point symbol {413·62}{48·66·8}, a 4,6-c 2-nodal net bpq with point symbol {32·62·72}{34·42·64·75}, and a 6,8-c 2-nodal net 6,8T902 with point symbol {34·44·54·63}{38·414·54·62}, respectively. Moreover, 1 exhibits intense solid-state luminescence emissions centered at 478 nm at room temperature, which mainly originates from the intraligand π→ π* transitions of TBA2−. The CCDC number of 1 is 2,355,788. [ABSTRACT FROM AUTHOR]

A portable sensing platform with excellent performance was constructed using CoNi-MOF-based chitosan-polyacrylamide hydrogel as a signal amplifier for the detection of adrenaline. [Display omitted] The development of a portable smartphone-based electrochemical sensor for analyzing adrenaline levels in real samples can make a great contribution to the research community worldwide. In order to achieve this goal, the key challenge is to build sensing interfaces with excellent electrocatalytic properties. In this work, microspherical bimetallic metal–organic frameworks (CoNi-MOF) consisting of nanoclusters were first synthesized using a hydrothermal method. On this basis, the catalytic activity of pure chitosan-polyacrylamide hydrogel (CS-PAM) was modulated by adding different amounts of CoNi-MOF during the in-situ synthesis of CS-PAM. Finally, a portable electrochemical detection system based on CS-PAM was established for the detection of adrenaline. A series of resulting composite hydrogels with a large specific surface area, abundant active sites, and unique network structure facilitate the enrichment and catalysis of adrenaline molecules. Under optimal conditions, the analytical platform constructed by using CoNi-MOF-based CS-PAM has the advantages of a wide detection range (0.5–10 and 10–2500 μM), a low detection limit (0.167 μM), and high sensitivity (0.182 and 0.133 μA·μM·cm−2). In addition, the sensor maintains selective detection of the target in the presence of many different types of interferences, and the current response is not significantly reduced even after 60 cycles of testing. We strongly believe that the designed smart portable sensing can realize the accurate determination of adrenaline in complex systems, and this study can provide new ideas for the research of MOFs-based hydrogels in electrochemical analysis. [ABSTRACT FROM AUTHOR]