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The degradability of an azo dye, Basic Blue 9 (BB9), by heterogeneous sonocatalytic, photocatalytic, and sonophotocatalytic oxidation process was examined using simultaneous irradiation of UV‐C at 254 nm and power ultrasound at 20 kHz accompanied with a heterogeneous catalyst zinc oxide (ZnO) in the study. The effect of ZnO dose and initial dye concentration was investigated on the dye degradation in sonocatalytic, photocatalytic, and sonophotocatalytic processes at pH 5.5 (natural pH). The results obtained from the experimental studies were evaluated with the parameters of color removal, pseudo‐first‐order rate constant, and half‐life time. It was observed that the degradation of BB9 dye by the sonophotocatalytic process was higher compared to both sonocatalytic and photocatalytic degradation. as follows: 97.46, 48.64 and 56.88 %. The combination of sono and photocatalytic showed a remarkable synergistic effect in BB9 degradation. The kinetics of sonophotocatalytic oxidations, depending on the initial BB9 dye concentration, were found to follow the Langmuir‐Hinshelwood model. In addition, the effect of ZnO on the sonophotocatalytic oxidation process was higher compared to titanium dioxide and zero‐valent iron as follows: 97.47, 80.77 and 80.62 %. [ABSTRACT FROM AUTHOR]

Two templated borates, [Co(1-EI)2]·[B5O7(OH)3] (1) and [Ga(1-MI)2·B6O9(OH)4]·[H3BO3]·H[1-MI] (2), have been synthesized using a mild method. Notably, they exhibit an excellent ORR performance with an E1/2 value of 0.84 V and are the first to be used as the positive electrode catalyst for a zinc–air battery, which opens a pathway for the application of borate-based oxide catalysts. [ABSTRACT FROM AUTHOR]

We report herein an enantioselective [3+3] annulation of indoline‐2‐thiones with yne–enones by chiral dinuclear zinc catalysts via a Brønsted base and Lewis acid cooperative activation model. This transformation proceeded through sequential conjugate addition, allenyl ketone formation and intramolecular sulfa‐Michael 6‐endo‐trig cyclization. A range of enantioenriched tetrahydrothiopyrano[2,3‐b]indole derivatives bearing an exocyclic double bond were obtained in moderate yields with excellent stereoselectivities (up to 20 : 1 dr, 20:1 Z/E ratio and 95% ee). Late‐stage functionalization, large‐scale experiment and further derivatizations were also explored. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal "Chemical Communications" published in 2024. It includes articles on various topics such as catalytic dehydrogenative coupling, superoxide dismutase nanozymes, hydrogen production from alcohols, and ion transport in solid-state batteries. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document provides a glimpse into the research articles featured in the journal, making it a valuable resource for library patrons conducting research in the field of chemistry. [Extracted from the article]

This article discusses the use of N-sulfopyridin-1-ium monozinc(II) trichloride ([NSPy]ZnCl3) as a catalyst for the synthesis of propargylamines through the A3 coupling reaction. Propargylamines are important compounds with various biological and pharmaceutical applications. The [NSPy]ZnCl3 catalyst was found to be effective in promoting the reaction under mild conditions, resulting in high yields of propargylamines. The structure of the catalyst was confirmed through spectroscopic and spectrometric analysis. The article provides detailed information on the optimization of reaction conditions and the synthesis of propargylamines using different aldehydes and amines. [Extracted from the article]

The document is a contents list for the New Journal of Chemistry, providing a range of research topics for library patrons interested in chemistry. It includes articles on the transformation of CO2, mechanochromic photoluminescence, nanocellulose-based electrocatalysts, bone formation rate prediction, and the synthesis of halogenated benzimidazolyl-C nucleosides. The journal also covers industrial chemistry, material innovations, and interdisciplinary features. Additionally, the document includes a retraction notice for a previous paper. [Extracted from the article]

Barrier membranes play a pivotal role in the success of guided periodontal tissue regeneration. The biodegradable barriers predominantly used in clinical practice often lack sufficient barrier strength, antibacterial properties, and bioactivity, frequently leading to suboptimal regeneration outcomes. Although with advantages in mechanical strength, biodegradability and plasticity, bioinert aliphatic polyesters as barrier materials are usually polymerized via toxic catalysts, hard to be functionalized and lack of antibacterial properties. To address these challenges, we propose a new concept that controlled release of bioactive substance on the whole degradation course can give a bioinert aliphatic polyester bioactivity. Thus, a Zn-based catalytic system for polycondensation of dicarboxylic acids and diols is created to prepare zinc covalent hybrid polyester (PBS/ZnO). The atomically-dispersed Zn2+ ions entering main chain of polyester molecules endow PBS/ZnO barrier with antibacterial properties, barrier strength, excellent biocompatibility and histocompatibility. Further studies reveal that relying on long-term controlled release of Zn2+ ions, the PBS/ZnO membrane greatly expedites osteogenetic effect in guided tissue regeneration (GTR) by enhancing the mitochondrial function of macrophages to induce M2 polarization. These findings show a novel preparation strategy of bioactive polyester biomaterials based on long term controlled release of bioactive substance that integrates catalysis, material structures and function customization. By using a newly designed zinc compound catalyst, a Zn2+-containing aliphatic polyester was successfully prepared. The resultant polyester not only has antibacterial property and mechanical properties, but also enhances osteogenetic effects through improving the mitochondrial function of macrophages when used as a GTR membrane. [Display omitted] • Zinc based catalyst is used to prepare poly(butylene succinate) (PBS/ZnO). • PBS/ZnO barrier shows good antibacterial property and osteogenetic effect in GTR. • PBS/ZnO enhances macrophage mitochondrial function to induce M2 polarization. • Bioacitve PBS/ZnO polyester shows a broad application prospect in biomedical field. [ABSTRACT FROM AUTHOR]

Zinc-promoted nickel catalysts on Ultra-Stable Y (USY) zeolite support are tested for their efficacy towards methane pyrolysis. The un-promoted catalyst obtained a conversion of 65.8%, which dropped to 57.3% at the end of the experiment. However, addition of 5 wt% Zn promoter increased the conversion to 67.7%, with no discernible loss in activity after 60 h on-stream. XPS analysis indicated evidence of electronic interaction between the Ni and Zn metals, and the addition of Zn caused a reduction in the metal-support interactions of the catalyst as revealed in TPR and XRD analyses. The catalytic activity of the 50Ni–5Zn/USY also remained completely stable for 60 h even after the operating temperature was increased to 650 °C and the partial pressure of methane in the inlet increased to 80%, at a High gas hour space velocity of 120 L/gcat.h. Analysis of the spent 50Ni–5Zn/USY catalyst revealed the presence of Ni–Zn carbides that may have contributed to the increase in activity, as well as the formation of large quantities of highly graphitic and ordered multi-walled carbon nanotubes produced by the tip-growth mechanism which have been shown to prolong catalyst lifetime on-stream. • Electronic interactions between Ni and Zn enhanced catalytic activity. • Zinc catalyst doping weakened metal-support interaction and increased NiO particle size. • 5% zinc loading raised methane conversion to 67.7% which remained stable for 60 h. • Addition of Zn increased the degree of carbon graphitization. • The observed tip growth carbon mechanism improved catalyst stability. [ABSTRACT FROM AUTHOR]

Two-dimensional (2D) materials have attracted a great deal of research interest because of their unique electrical, magnetic, optical, mechanical, and catalytic properties for various applications. To date, however, it is still difficult to fabricate most functional oxides as 2D materials unless they have a layered structure. Herein, we report a one-step universal strategy for preparing versatile non-layered oxide nanosheets by directly annealing the mixture of metal nitrate and dimethyl imidazole (2-MI). The 2-MI plays the key role for 2D oxides since 2-MI owns a very low molten point and sublimation temperature, in which its molten liquid can coordinate with metal ions, forming a metal-organic framework, and easily puffing by its gas molecules. A total of 17 materials were prepared by this strategy, including non-layered metal oxide nanosheets as well as metal/metal oxide loaded nitrogen-doped carbon nanosheets. The as-prepared cobalt particle-loaded nitrogen-doped carbon nanosheets (Co@N/C) exhibit remarkable bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalytic activity and durability. Besides, the Zn-air battery utilizing a Co@N/C catalyst exhibits high power density of 174.3 mW·cm−2. This facile strategy opens up a new way for large-scale synthesis of 2D oxides that holds great potential to push 2D oxides for practical applications. [ABSTRACT FROM AUTHOR]

In this study, a magnetic catalyst of phosphotungstic acid salt (ZnHPMo12O40) was prepared by substitution of protons in H3PW12O40 with zinc metal cations as a recyclable catalyst. The structural and morphology of the prepared catalysts was investigated using Fourier transform infrared spectroscopy (FT-IR), differential thermal gravimetric analysis (TGA), BET surface analysis emission scanning electron microscopy (SEM) and vibrating sample magnetometry (VSM). The prepared catalyst was successfully used as an efficient and recyclable catalyst for the synthesis of 4H-pyrans. The results showed that the magnetic zinc phosphotungstic acid catalyst exhibited good catalytic activity under optimum reaction conditions and the desired products were obtained in good to excellent yields. The good activity of the zinc salt of heteropoly acid catalyst was closely related to its high specific surface area, and the synergistic effects of Lewis and Brønsted acidity. The catalyst stability was good and it can be reused six times without significant loss activity in reaction. [ABSTRACT FROM AUTHOR]

Glycolide was polymerized in bulk by means of four different ROPPOC catalysts: tin(II) 2-ethylhexanoate (SnOct2), dibutyltin bis(pentafluoro-phenoxide) (BuSnOPF), zinc biscaproate (ZnCap), and zinc bis(pentafluoro-phenyl sulfide) (ZnSPF). The temperature was varied between 110 and 180°C and the time between 3 h and 7 days. For the few polyglycolides (PGAs) that were soluble extremely high molecular masses were obtained. The MALDI TOF mass spectra had all a low signal-to-noise ration and displayed the peaks of cyclic PGAs with a "saw-tooth pattern" indicating formation of extended-ring crystallites in the mass range below m/z 2500. The shape of DSC curves varied considerably with catalyst and reaction conditions, whereas the long-distance values measured by SAXS were small and varied little with the polymerization conditions. [ABSTRACT FROM AUTHOR]

The New Journal of Chemistry, published by The Royal Society of Chemistry, has released its latest issue which includes a variety of articles covering different topics in the field of chemistry. The papers discuss recent progress in areas such as nitrogen-heterocycles, chemisorption of gases, photoactive derivatives, and potential applications of nanoribbons. The journal aims to connect the global community with the chemical sciences and provides scientific insights and advancements in various fields of study. [Extracted from the article]

The document is the contents list for the journal "Chemical Communications" published in 2024. It includes a variety of articles on topics such as solar-driven upcycling of waste polyesters, synthesis of isothiocyanates, fabrication of organic solvent nanofiltration membranes, and catalyst-free reductive coupling of aldehydes and ketones. The journal is published by The Royal Society of Chemistry, a leading chemistry community, and aims to connect the world with the chemical sciences. [Extracted from the article]

Achieving selective hydrodeoxygenation of α, β-unsaturated carbonyl groups to alkenes poses a substantial challenge due to the presence of multiple functional groups. In this study, we develop a ZnNC-X catalyst (X represents the calcination temperature) that incorporates both Lewis acidic-basic sites and Zn-Nx sites to address this challenge. Among the catalyst variants, ZnNC-900 catalyst exhibits impressive selectivity for alkenes in the hydrodeoxygenation of α, β-unsaturated carbonyl compounds, achieving up to 94.8% selectivity. Through comprehensive mechanism investigations and catalyst characterization, we identify the Lewis acidic-basic sites as responsible for the selective hydrogenation of C=O bonds, while the Zn-Nx sites facilitate the subsequent selective hydrodeoxygenation step. Furthermore, ZnNC-900 catalyst displays broad applicability across a diverse range of unsaturated carbonyl compounds. These findings not only offer valuable insights into the design of effective catalysts for controlling alkene selectivity but also extend the scope of sustainable transformations in synthetic chemistry. The selective reduction of α, β-unsaturated carbonyls remains a challenge. Here the authors report a zinc-based catalyst for this reaction, converting α, β-unsaturated carbonyl compounds into unsaturated alcohols followed by hydrodeoxygenation to form alkenes. [ABSTRACT FROM AUTHOR]

A method of stereodivergent intramolecular ring‐opening arylation of amine‐tethered epoxides to 3,4‐disubstituted tetrahydroquinolines has been developed. The tuneable good stereoselectivity was attained by changing the catalyst from titanocene(III) catalyst to Lewis‐acidic zinc catalyst. [ABSTRACT FROM AUTHOR]

Catalysts enriched in Zinc ferrite (ZFO) were synthesized using coprecipitation and hydrothermal methods. Mixtures of crystalline nanoparticles (ZFO and α-Fe2O3, several allotropic varieties of FeO) were characterized by various techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM, SEM), N2 sorption, UV-visible spectrophotometry (UV-Vis) and X-ray photoelectron spectroscopy (XPS). After detailed characterizations, the catalytic performance of the solids (1 g/L) in the degradation of amoxicillin (AMX) (10 mg/L) as an antibiotic pollutant in water was evaluated. In addition, we used air as the oxygen source and adjusted the pH to 5.0. Consequently, the catalysts obtained via the hydrothermal method HT-ZFO had a high activity (100% of AMX removal in less than 100 min when an LED (75 W) light was used) compared to a similar mixture of oxides with graphene HT-ZFO-GO (a longer time of 150 min) that was necessary for the complete degradation of AMX. Impregnation with an aqueous solution containing 80 mg of GO obtained using Hummer's method, reduced into RGO by an ultrasound treatment, enhances the initial reaction rate but is associated with a prolonged time for complete AMX removal (10 ppm in water) that we attribute to its spontaneous corrosion. [ABSTRACT FROM AUTHOR]

In recent years, as an emerging dynamic bonding, silyl ether linkages have been concerned and applied. However, the reprocessability of vitrimers based on it is far from satisfactory because of the inactive dynamic exchange reaction. At the same time, the mechanical properties of polysiloxane elastomers are poor because of the high flexibility of polysiloxane molecular chains and weak intermolecular forces. Herein, we have successfully synthesized a PDMS elastomer incorporating Zn(II)‐amine coordination bonds as sacrificial units, which are crosslinked through dynamic silyl ether linkages. Importantly, the presence of Zn ions promotes the exchange between the silyl ether linkages and hydroxyl groups. The elastomers exhibited excellent mechanical properties (35 times improvement in toughness) and outstanding reprocessability. The mechanical property recovery of the PDMS elastomers reached approximately 90% after four reprocessing cycles. Meanwhile, small‐molecule simulation experiments were conducted to verify the significant catalytic effect of Zn (II) ions as Lewis acid catalysts on the exchange reaction of silyl ether linkages and hydroxyl groups. In a word, this work provides a facile strategy to simultaneously enhance the mechanical properties and reprocessing performance of silyl ether‐linked polysiloxane elastomers. [ABSTRACT FROM AUTHOR]

The rationale for this study lies in the investigation of the transesterification of crude Jatropha curcas oil into biodiesel using advanced heterogeneous catalysts under supercritical methanol conditions. The oxides of strontium, lanthanum, and zinc (SrO, La2O3, and ZnO) were synthesized with varying loadings (2 wt %, 6 wt %, and 10 wt %) on γ‐Al2O3 using the wet impregnation method followed by calcination at 900 °C. To gain a comprehensive understanding of the prepared catalysts, multiple analytical techniques were employed, including scanning electron microscopy (SEM) with energy‐dispersive X‐ray spectroscopy (EDS), Brunauer‐Emmett‐Teller (BET) surface area analysis, X‐ray diffraction (XRD), and Fourier transform infrared (FT‐IR) spectroscopy. The performance of the catalysts was assessed through the measurement of biodiesel yield, where the SrO/γ‐Al2O3, ZnO/γ‐Al2O3, and La2O3/γ‐Al2O3 systems produced yields of 97.54 %, 97.49 %, and 97.36 %, respectively, under identical reaction conditions of a 1 : 40 oil to methanol molar ratio, 10 wt % catalyst loading amount, 300 °C reaction temperature, 90 bar reaction pressure, and a reaction time of 3 min. Despite a minimal decrease of 0.05 %, zinc oxide catalysts remain highly attractive due to their favorable price position compared to strontium. Additionally, the catalyst can be reused up to 12 times with minimal loss in biodiesel yield (~2 %). [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal Chemical Communications. It provides information about the articles and features included in the issue, such as recent progress in beryllium organometallic chemistry and recent advances in phase change materials for thermal energy storage. The journal is published by The Royal Society of Chemistry, which aims to connect the world with the chemical sciences and reinvest profits back into the chemistry community. The document also mentions other journals published by The Royal Society of Chemistry, including those focused on environmental science. [Extracted from the article]

The document is the contents list for the journal "Chemical Communications" published in 2024. It includes articles on various topics such as catalysts and electrolyzers for CO2 reduction, small molecule activation, quantum stereodynamics, and more. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document provides a list of articles and authors, along with images from selected articles. [Extracted from the article]

Environmental organo bentonite synthesis using curcumin-derived chemicals is used as catalyst support for zinc with a Zn-pillaring structure (Zn@CU/BEN). The obtained composite was assessed as an affordable, highly effective, and multifunctional photocatalyst for enhanced oxidation of ibuprofen (IBU) residuals in water supplies. The Zn@CU/BEN composite (0.4 g/L) displayed significant catalytic activities, resulting in the complete oxidation of IBU (25 mg/L) after 80 min. Then, the complete mineralization based on the full elimination of TOC content was recognized after 160 min, with significant indications about the formed intermediates. The identified intermediates, together with the identification of hydroxyl radicals as the essential oxidizing agent, declared an oxidation pathway of IBU over Zn@CU/BEN that involved three steps: hydroxylation, decarboxylation/demethylation, and ring-opening processes. The toxic properties of raw pollutants as well as the oxidizing product at different durations were assessed based on the cell viability results of kidney (HEK293T) and liver (HepG2) cell lines. The partially oxidized sample in the initial duration displayed a higher toxicity impact than the raw IBU. However, the treated sample after 160 min reflected high biosafety and non-toxic properties (cell viability > 97%). The synergetic impact of bentonite and bentonite organo-modified by curcumin extract reflects enhancements in the adsorption as well as the oxidation performance of pillared zinc as a catalyst. [ABSTRACT FROM AUTHOR]

Electrochemical carbon dioxide reduction reaction (ECO2RR) act as a green and value‐added technology, which could convert CO2 into products with circulation value, has a good application prospect. However, the activity of non‐mainstream Zn‐based catalysts has not yet reached satisfactory expectations, and how to further modify them to improve the performance of CO production performance still remains a challenge. In our work, a design of hybrid engineering is proposed to enhance the activity of Zn‐based materials, in which the introduction of slight Ag could not only optimize the electronic structure of Zn‐based materials but also effectively increase their electrochemically active surface area. Compared with pure ZnO, the faraday efficiency of CO (FECO) in Ag/ZnO increased by 1.7 times from 45.9 % to 80.3 % at −0.977 V vs. RHE. Moreover, the long‐term and stable output of products in the electrolysis process also confirms the superior stability of the hybrid catalyst According to the in‐situ Raman study, it is confirmed that the main factor for the enhanced CO selectivity after the introduction of Ag is the improvement of the key *COOH intermediates. This study provides an effective strategy for constructing highly active Zn‐based catalysts for industrial‐scale ECO2RR. [ABSTRACT FROM AUTHOR]

In this work, electrochemically exfoliated graphene oxide-based photocatalyst was synthesised with the help of single- (sodium dodecyl sulphate; SDS) and triple-chain (sodium 1,4-bis(neopentyloxy)-3-(neopentylcarbonyl)-1,4-dioxobutane-2-sulfonate; TC14) anionic surfactants. The hybrid photocatalyst is a system consisting of surfactant-assisted electrochemically exfoliated graphene oxide (sEGO) and zinc oxide (ZnO). The system was prepared by exfoliating graphite in the presence of surfactant and ZnO, and it was used for the removal of methylene blue (MB) dye. Of these different surfactants, the triple-chain TC14 exhibited 98.53% MB removal, which was significantly higher than the system with SDS surfactant (50.94%) or ZnO alone (42.33%). Observations through field-emission scanning electron microscopy suggested an enhanced exfoliation degree upon increasing the number of surfactant chains. Results from zeta potential measurement also revealed increased system stability along with a high number of surfactant chains and the addition of ZnO into the system. These findings highlight the importance of tailoring the surfactant's chemical structure to achieve enhanced graphene oxide-based photocatalyst performance for MB dye removal and wastewater treatment. [ABSTRACT FROM AUTHOR]

Carbon-based single-atom catalysts, a promising candidate in electrocatalysis, offer insights into electron-donating effects of metal center on adjacent atoms. Herein, we present a practical strategy to rationally design a model catalyst with a single zinc (Zn) atom coordinated with nitrogen and sulfur atoms in a multilevel carbon matrix. The Zn site exhibits an atomic interface configuration of ZnN4S1, where Zn's electron injection effect enables thermal-neutral hydrogen adsorption on neighboring atoms, pushing the activity boundaries of carbon electrocatalysts toward electrochemical hydrogen evolution to an unprecedented level. Experimental and theoretical analyses confirm the low-barrier Volmer-Tafel mechanism of proton reduction, while the multishell hollow structures facilitate the hydrogen evolution even at high current intensities. This work provides insights for understanding the actual active species during hydrogen evolution reaction and paves the way for designing high-performance electrocatalysts. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal "Chemical Communications." It includes a list of featured articles, cover images, and information about other journals published by The Royal Society of Chemistry. The articles cover a range of topics in chemistry, including organic photovoltaic heterojunctions, photocatalysis, hydrogen isotope exchange, and anticancer therapy. The document also provides information about the editors and impact factors of other journals in the field of energy research. [Extracted from the article]

Efficient NNN‐pincer type bis(imino)pyridine ligand based zinc(II) catalyzed intermolecular amidation of benzylic hydrocarbons with sulfonamides has been developed. The zinc complexes were synthesized by the reaction of bis(imino)pyridine ligand with zinc(II) precursors such as Zn(OAc)2 ⋅ 2H2Oand ZnBr2. The structure of the bis(imino)pyridine‐Zn(OAc)2 complex was characterized by single crystal X‐ray diffraction. The zinc(II)‐bis(imino)pyridine complexes were utilized as catalysts for the intermolecular amidation of benzylic C(sp3)−H bond in the presence of N‐bromosuccinimide (NBS) as an oxidant. A broad range of substrates delivered the products in moderate to good yields. This protocol provides the synthesis of various amides viaC−H activation. [ABSTRACT FROM AUTHOR]

Biomass-derived carbon materials have been proved to be a prominent catalysts for oxygen reduction reaction (ORR). The chemical activator used in the preparation process of biomass-derived carbon materials has an important impact on its ORR performance. Exploration of suitable chemical activator has become extremely important. Three zinc halides (ZnF 2 , ZnBr 2 , and ZnI 2) and ZnCl 2 used as the activators for the preparation process of rice straw-derived carbon (SDXNC) were carefully studied for the first time. The surface area, pore volume, doping N content and surface defect of as-prepared SDXNCs were effectively improved with the pyrolysis temperature of 1100 °C, further improving the ORR activity of SDXNC samples. The four rice straw-derived carbons activated by ZnX 2 presented high onset potential, half-wave potential and limited current density, which can comparable to those of Pt/C. Moreover, they also occupy the typical 4-electron reduction pathway, ultrahigh methanol tolerance, and durability for ORR. Therefore, a class of low-cost and excellent chemical activators can be used for the preparation of biomass-derived carbon materials with prominent ORR activity. • For the first time, three ZnX 2 were used as activators for the preparation of biochar. • The surface area, pore volume, N content and disorder degree of SDXNCs were improved. • The n values of four SDXNC for ORR process is close to 4, indicating a 4-e pathway. [ABSTRACT FROM AUTHOR]

The development of efficient and low‐cost bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is imperative but remains challenging in rechargeable zinc–air batteries. Herein, a metal oxidation‐assisted approach is developed for the facile synthesis of a highly efficient bifunctional catalyst (Co@NC@LDHs) which is composed of layered double hydroxides (LDHs) nanosheets in situ vertically grown on the surface of hollow carbon nanoframes encapsulating Co nanoparticles (Co@NC). Specifically, the vertical LDHs distributing on the carbon surface ensure the maximized number of accessible active sites and the interaction between LDHs with the carbon matrix. The hierarchically structured bifunctional Co@NC@LDHs display an overpotential of 0.33 V at 10 mA cm−2 for OER and a half‐wave potential of 0.88 V for ORR. The potential gap (ΔE) of Co@NC@LDHs is calculated to be 0.68 V, outperforming the mixed Pt/C + RuO2 catalysts (ΔE = 0.77 V), manifesting its superior bifunctional electrocatalysis performance. Moreover, the Zn–air batteries based on Co@NC@LDHs electrocatalyst exhibit a high peak power density (185.2 mW cm−2) and excellent durability (5.0 mA cm−2 over 500 h). This work may provide a facile strategy for the fabrication of LDHs on carbon substrate, acting as efficient catalysts for broad energy‐related applications. [ABSTRACT FROM AUTHOR]

A series of ZnO-doped nitrogen-carbon materials (xZnO-N-C) with ZnO contents of 5–40% are prepared by a vacuum curing–carbonization strategy using polyamide-imide as the N-C source and zinc nitrate as the metal source for propane dehydrogenation (PDH). 20ZnO-N-C exhibits outstanding initial activity (propane conversion of 35.2% and propene yield of 24.6%) and a relatively low deactivation rate (0.071 h−1) at 600 °C. The results of detailed characterization show that small ZnO nanoparticles (5.5 nm) with high dispersion on the catalyst can be obtained by adjusting the ZnO loading. Moreover, more nitrogen-based species, especially ZnNx species, are formed on 20ZnO-N-C in comparison with 20ZnO-N-C-air prepared via curing carbonization without vacuum, which may contribute to the higher product selectivity and catalytic stability of 20ZnO-N-C. The active sites for the PDH reaction on the catalyst system are proposed to be C=O species and Zn2+ species. Moreover, the carbon deposition and the aggregation of ZnO nanoparticles are the causes of activity loss on this catalyst system. [ABSTRACT FROM AUTHOR]

In this study, we report the design, synthesis, and catalytic application of the novel nitrogen-rich Zn(II) MOF [Zn2(μ3-1κN,2κN′,3κO-HL)2(DMF)2]n·nH2O (HL2− = 4-((4-(1H-tetrazol-5-yl)phenyl)carbamoyl)benzoate), denoted as ZnMOF, for the efficient conversion of carbon dioxide (CO2) to cyclic carbonates via cycloaddition with epoxides. It was synthesised from a tetrazole appended amide-functionalised pro-ligand (H3L) and Zn(NO3)2·6H2O under hydrothermal conditions. The synthesised material was characterised namely by elemental analysis, infrared spectroscopy, powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction analyses. The catalytic potential of ZnMOF was investigated in the CO2 cycloaddition reaction with various epoxides, with conversions ranging from 17% to 99%. The catalyst retained its activity across multiple reaction cycles, demonstrating its stability and reusability. The influence of co-catalysts on the reaction was explored, with tetrabutylammonium bromide (TBABr) emerging as the most effective one. A plausible reaction mechanism is proposed. [ABSTRACT FROM AUTHOR]

In this study, we have successfully synthesized a high surface area of activated carbons (ACs) from cocoa pod husk (CPH) by using a combination of hydrothermal carbonization (HTC) and chemical activation in the presence of ZnCl2 as both of catalyst as well as activating agent. During HTC, the effect of HTC temperature (200 and 225℃) and ZnCl2 to biomass mass ratio (1:1, 2:1, 3:1) as a catalyst to the characteristics of the obtained hydrochar (HC) and ACs were investigated. The obtained hydrochar (HCs) was then processed by using ZnCl2 chemical activation with a fixed HC to ZnCl2 mass ratio of 1:4 and the mixture was pyrolyzed at 600 ℃ for 1 h under an inert atmosphere. The results showed that the addition of catalyst during HTC presented different AC morphology, where the carbon samples were decorated with carbon microspheres. An increase of surface area was observed, where the ACs synthesized from catalyzed HC at biomass to ZnCl2 ratio of 1:3 at temperature 200 ℃ gave a higher surface area of 1954 m2/g compared to that of without catalyst (1165 m²/g). The catalysis effect was more profound at the HTC temperature of 200 ℃ compared to 225 ℃, as reflected in the significant increase of AC surface area. The addition of a catalyst creates ACs with narrow pore distribution compared to that of synthesized in the absence of a catalyst. It was also observed that the ACs from catalyzed hydrochar possessed higher oxygenated functional groups (OFG) than those without catalysts. [ABSTRACT FROM AUTHOR]

The New Journal of Chemistry, published by the Royal Society of Chemistry and the Centre National de la Recherche Scientifique, features a collection of papers covering various topics in chemistry. The papers focus on specific research studies and provide detailed information on methods and results. Topics include catalysis, nanomaterials, photocatalysis, and electrochemistry. Written by authors from different institutions, these papers offer a comprehensive overview of recent research in the field of chemistry. [Extracted from the article]

This document is the contents list for an issue of the journal Chemical Communications. It provides information about the articles in the issue, including the ISSN, CODEN, and page numbers. The cover image is credited to Dr. Xuedan Wu from the Li lab and Sci-Shine Studio Co., Ltd. The document also includes information about the Royal Society of Chemistry, the editorial staff, subscription details, and the editorial board. It provides instructions for authors who wish to submit material for publication and guidelines for reproducing published contributions. The document also lists featured articles and communications that have been published in the journal. It is published by The Royal Society of Chemistry and includes copyright information and guidelines for use. [Extracted from the article]

A zinc (Zn)‐based single‐atom catalyst (SAC) is recently reported as an active Fenton‐like catalyst; however, the low Zn loading greatly restricts its catalytic activity. Herein, a molecule‐confined pyrolysis method is demonstrated to evidently increase the Zn loading to 11.54 wt.% for a Zn SAC (ZnSA‐N‐C) containing a mixture of Zn−N4 and Zn−N3 coordination structures. The latter unsaturated Zn−N3 sites promote electron delocalization to lower the average valence state of Zn in the mix‐coordinated Zn−Nx moiety conducive to interaction of ZnSA‐N‐C with peroxydisulfate (PDS). A speedy Fenton‐like catalysis is thus realized by the high‐loading and low‐valence ZnSA‐N‐C for PDS activation with a specific activity up to 0.11 min L−1 m−2, outstripping most Fenton‐like SACs. Experimental results reveal that the formation of ZnSA‐N‐C−PDS* complex owing to the strong affinity of ZnSA‐N‐C to PDS empowers intense direct electron transfer from the electron‐rich pollutant toward this complex, dominating the rapid bisphenol A (BPA) elimination. The electron transfer pathway benefits the desirable environmental robustness of the ZnSA‐N‐C/PDS system for actual water decontamination. This work represents a new class of efficient and durable Fenton‐like SACs for potential practical environmental applications. [ABSTRACT FROM AUTHOR]

This document is the contents list for an issue of the journal Chemical Communications. It provides information about the articles in the issue, including their page numbers and the ISSN and CODEN for the journal. One highlighted article explores the use of polymer chemistry and machine learning for the nonviral delivery of small molecule and genetic drugs. Another featured article discusses the impact of synthesis without solvent on mechanochemical reactivity. The document also includes details about the Royal Society of Chemistry, the editorial staff, and subscription information. It is a useful resource for authors looking to submit material for publication in Chemical Communications, as it provides submission instructions and guidelines for reproducing published contributions. Additionally, the document outlines the copyright information and permissions required for reproducing the publication. [Extracted from the article]

Using Zn(OTf)2 as catalyst, a highly regio- and chemo-selective cyclocarboamination of o-alkynylbenzaldehydes with tertiary alkyl primary amines was realized to access 3-aminoindenes with different substitution patterns from previously reported methods. The full reduction of the iminoindenone intermediates affords cis-1-amino-2-arylindanes with excellent diastereoselectivity. Mechanistically, the reaction involves the rearrangement of 1-amino-3-arylidene-isoindolines and isomerization of 1-aminoindenes to 3-aminoindenes. [ABSTRACT FROM AUTHOR]

A set of new generation N/O donors, maleonitrile tethered, tetradentate heteroscorpionate modified Schiff base type ligands, 2-((E)-2-hydroxybenzylideneamino)-3-(pyridin-2-ylmethylamino)maleonitrile (H2LH), 2-((E)-2-hydroxy-5-nitrobenzylideneamino)-3-(pyridin-2-ylmethylamino)maleonitrile (H2LNO2), and 2-((E)-2-hydroxy-3-methoxybenzylideneamino)-3-(pyridin-2-ylmethylamino)maleonitrile (H2LOMe) were synthesized. These ligands were reacted with a stoichiometric amount of zinc acetate to afford corresponding mononuclear Zn complexes [Zn(LH)] (1H), [Zn(LNO2)] (1NO2), and [Zn(LOMe)] (1OMe) with excellent yields. All metal complexes and ligands were fully characterized using all possible spectroscopic tools, including single-crystal X-ray structure analysis in some cases. The 1H NMR spectral feature was well explained in terms of the electronic effect of the ligand's substitution at the phenyl ring. Novel monomeric Zn complexes supported by heteroscorpionate ligands were explored as effective catalysts to convert CO2 and CS2 to cyclic carbonates and thiocarbonates, respectively, via epoxide ring opening under mild and solvent-free conditions where tetrabutylammonium bromide (TBAB) was used as co-catalyst. The synthesized catalyst activates CO2 and CS2 at ambient conditions, whereas most of the reported catalysts require harsh conditions. Electronically, the Zn center in 1H was found to have the highest Lewis acidity, enabling better catalytic activity with respect to other Zn complexes. The probable mechanisms of catalytic activity for CO2 and CS2 activation were also explained. Mechanistically, the {Zn–Br} unit serves as a Lewis acidic platform that stabilizes the activated epoxide intermediate after ring opening by bromide ion and provides suitable nucleophiles for a further attack at the CO2/CS2 center. Exclusive cyclic carbonate/thiocarbonate formation was explained as the cyclization of activated CO2/CS2 product occurring at the Zn center before it is released as an acyclic intermediate. [ABSTRACT FROM AUTHOR]

The New Journal of Chemistry is a publication by the Royal Society of Chemistry that focuses on publishing innovative and high-quality research in the field of chemistry. The contents list provides information about the purpose of the journal and includes articles on topics such as catalytic oxidation of carbon monoxide and synthesis of spirotriazolines and spirooxadiazolines. The journal covers a wide range of topics including the synthesis of nanoparticles, catalytic reactions, electrochemical reduction, and drug discovery. The papers offer insights into scientific phenomena and potential applications in fields such as energy storage, wastewater treatment, and medicine. [Extracted from the article]

Transition metals and organic ligands combine to form metal‐organic frameworks (MOFs), which possess distinct active sites, large specific surface areas and stable porous structures, giving them considerable promise for CO2 reduction electrocatalysis. In the present study, using spin polarisation density‐functional theory, a series of 2D MOFs constructed from 3d transition metal and hexamethylene dipyrazoline quinoxaline(HADQ) were investigated. The calculated binding energies between HADQ and metal atoms for the ten TM‐HADQ monolayers were strong sufficient to stably disperse the metal atoms in the HADQ monolayers. Of the ten catalysts tested, seven (Sc, Ni, Cu, Zn, Ti, V and Cr) exhibited high CO2 reduction selectivity, while Mn, Fe and Co required pH values above 2.350, 6.461 and 6.363, respectively, to exhibit CO2 reduction selectivity. HCOOH was the most important producer for Sc, Zn, Ni and Mn, while CH4 was the main producer for Ti, Cr, Fe and V. Cu and Co were less selective, producing HCHO, CH3OH, and CH4 simultaneously at the same rate‐determining step and limiting potential. The Cu‐HADQ catalyst had a high overpotential for the HCHO product (1.022 V), while the other catalysts had lower overpotentials between 0.016 V and 0.792 V. Thus, these results predict TM‐HADQ to show excellent activity in CO2 electrocatalytic reduction and to become a promising electrocatalyst for CO2 reduction. [ABSTRACT FROM AUTHOR]

In this work, thioether-amide ligands featuring a combination of hard amide groups with soft donor groups have been employed to develop new zinc catalysts for the ring-opening polymerization of cyclic esters. All complexes were prepared in high yields through alkane elimination reactions with diethyl zinc and characterized using nuclear magnetic resonance (NMR) spectroscopy. Density functional theory (DFT) characterization provided insight into the parameters that influence catalytic activity, such as steric hindrance at the metal center, Lewis acidity and electronic density of thioether-amide ligands. In the presence of one equivalent of isopropanol, all complexes were active in the ring-opening polymerization of rac-β-butyrolactone. Quantitative conversion of 100 monomer equivalents was achieved within 1 h at 80 °C in a toluene solution. Number-average molecular weights increased linearly with monomer conversion; the values were in optimal agreement with those expected, and polydispersity index values were narrow and relatively constant throughout the course of polymerization. The most active complex was also effective in the ring-opening polymerization of ε-caprolactone and L-lactide. To propose a reliable reaction path, DFT calculations were undertaken. In the first step of the reaction, the acidic proton of the alcohol is transferred to the basic nitrogen atom of the amide ligand coordinated to the zinc ion. This leads to the alcoholysis of the Zn-N bond and the formation of an alcoholate derivative that starts the polymerization. In subsequent steps, the reaction follows the classical coordination–insertion mechanism. [ABSTRACT FROM AUTHOR]

Vitrimers are a class of polymers that combine the chemical and mechanical properties of traditional thermosets with the reshaping and reprocessing features of thermoplastics. Their reshaping ability is given by the presence of reversible bonds within their structure. While the nature of bonds that can ensure a dynamic behavior to the crosslinked network is well established, the challenge remains open to assess and control the reactivity of the system to rationally develop materials with desirable features in terms of processability and recyclability. In this work, a "free‐model" analysis of the curing reaction of an epoxy/anhydride resin in presence of zinc acetylacetonate as catalyst for both the curing reaction and transesterification is performed. Isothermal and non‐isothermal tests are conducted, and the data obtained are analyzed by means of isoconversional methods. The goal is to get an in‐depth insight into the reaction mechanism and the structure deriving from the crosslinked network formation, which can ultimately determine the material properties and eventually its actual reprocessability. [ABSTRACT FROM AUTHOR]

We report the synthesis of cyclometalated monoaryl MnIII fluoro complexes using bis(trifluoromethyl)zinc reagent, Zn(CF3)2(DMPU)2, under mild conditions via a reaction pathway that involves initial transmetalation followed by α‐fluorine elimination. The formation of difluorocarbene in these reactions was detected by trapping experiments. Such facile difluorocarbene generation from MnIII results in moderate enhancement of difluoropropanation and difluoropropenation of alkenes and alkynes using Zn(CF3)2(DMPU)2 at lower temperature (20–60 °C) and short reaction time, suggesting potential application of manganese(III) perfluoroalkyl complexes as reactive species for carbene transfer reactivity. [ABSTRACT FROM AUTHOR]

The document is a contents list of the New Journal of Chemistry, a publication that focuses on various topics in the field of chemistry. It includes a list of articles in the current issue, along with the names of the authors and a brief description of each article. The journal covers a wide range of subjects, such as catalyst synthesis, drug discovery, nanotechnology, and chemical reactions. The document also provides information about the editorial staff and contact details for submitting articles or making inquiries. It concludes with details about subscriptions and copyright. This document serves as a valuable resource for researchers interested in accessing the latest research in chemistry. [Extracted from the article]

A series of pyrimidine heterocyclic compounds have been synthesized through a one-pot, three-component reaction of an aryl aldehyde, ketone and urea in the presence of nano zinc ferrite catalyst under conventional heating methods. The synthesized derivatives have been characterized by using spectral techniques such as FT-IR, 1H and 13C NMR and elemental analysis. Molecular docking studies have also been carried out to identify the protein-ligand interactions and binding affinity of the newly synthesized compounds. This work has multiple advantages of providing good yields, high efficiency and retrievable catalyst. [ABSTRACT FROM AUTHOR]

Isomorphous substitution of Zn-Y zeolite (Zn-DYZ) was successfully conducted with different Zn/Al ratios of 0.5:9.5, 1:9, 1.5:8.5, and 2:8 mol ratios (hereafter designed as Zn-DZY-1, Zn-DZY-2, Zn-DZY-3, and Zn-DZY-4, respectively) by the hydrothermal synthesis method. Spectroscopic studies indicate that Zn is decorated into the zeolite framework. The insertion of Zn instead of Al in the zeolite framework in small amounts (0.5:9.5, 1:9 mol ratios of Zn/Al) does not affect the zeolite framework. However, at high Zn loading (mainly Zn-DZY-4, 2:8 mol ratio), the zeolite structure collapse due to the imbalance in electrical charge, as confirmed by XRD analysis. In addition, by increasing the loading of Zn, the deviation of d-spacing and shift in the peak position of the XRD pattern occurs, which is related to the radius of zinc ion compared to aluminum, thus causing the lattice expansion. A significant increase in BET surface area and pore volume was observed in Zn-DZY toward NaY (870 toward 906.5 and 0.37 cm3 g−1 towards 0.392 cm3 g−1, respectively), which may be related to the expansion of the zeolite framework because of the replacement of Zn instead to that of Al. These results confirm by XPS data. The XPS results show two different chemical environments are related to Al-O-Zn and Si–O-Zn with bit shifts. In addition, the peak position is higher than toward ZnO which is a significant reason for the formation of ZnO42− in the zeolite framework. The photocatalytic activity of the related catalysts is investigated in the removal of methyl orange. The effect of several parameters including catalyst loading, pH, dye contamination, and zinc loading was studied in the photodegradation process. The best results were obtained in the presence of 32 ppm methyl orange, 70 mg catalyst, pH = 7, and 1:9 Zn/Al ratio under UV irradiation. It was found that the photodegradation kinetics follows pseudo-first-order kinetics. COD experiment was used to measure the mineralization of methyl orange (69%). In addition, the activation energy Ea = 64,498.18 kJ mol−1 and ln A = 2.8079 kJ mol−1 was achieved based on the Arrhenius equation. Moreover, the antibacterial activity of Zn-DZY-2 is increased toward NaY for both E. coli and S. aureus. [ABSTRACT FROM AUTHOR]

A highly efficient recoverable and reusable heterogeneous Zn-catalyst, chitosan supported ZnSO4. 7H2O (designated as Zn@CS) is synthesized via a simple synthetic route. Low catalyst loading, need of aqueous reaction media and sharp reduction of time requirement in comparison to the previously reported methodologies are some special features of the established Zn catalyzed direct azide-alkyne cycloaddition reaction. Zn@CS-catalyst is also suitable for multicomponent synthesis of 4-aryl-NH-1,2,3-triazoles from different derivatives of benzaldehyde. An inexpensive and environmentally benign deep eutectic solvent (DES), ChCl:PEG-400:Glycerol as a suitable reaction media accelerates these reactions leading to excellent yields of NH-triazoles. Based on literature report a plausible mechanism has been suggested for ZnAAC reaction. [ABSTRACT FROM AUTHOR]

This work describes a novel method for the efficient reductive depolymerization of polyester and polycarbonate plastic waste using pinacolborane (HBpin) catalyzed by Zn(OAc)2.2H2O and Zn(OTf)2. This method is applied to a variety of plastic waste and has the advantages of combining the use of non‐toxic, cheap, and commercially available catalysts with a mild, easy‐to‐handle reducing agent, with excellent yields, under mild reaction conditions. [ABSTRACT FROM AUTHOR]

The electrochemical reduction reaction of carbon dioxide (CO2RR) has garnered significant attention due to its potential for the formation of carbon monoxide, which has industrial relevance. Herein, an oxide‐derived Cu–Zn electrocatalyst with an optimized CuxO layer that shows high selectivity toward CO with a faradic efficiency of 75% at a low overpotential (−0.8 V vs reversible hydrogen electrode) is reported. Various structural characterizations and activity tests are conducted to understand the origin of this improvement depending on the CuxO amount. Electrochemical surface area and electrochemical impedance spectroscopy measurements suggest that the addition of CuxO increases double‐layer capacitance and decreases charge transfer resistance. Scanning electron microscopy images indicate that the electrodes undergo a severe reconstruction process, which is further confirmed by X‐ray diffraction that shows the formation of CuZn4 alloy during the reduction reaction. Furthermore, X‐ray photoelectron spectroscopy depth profile analysis shows that after CO2RR at −0.8 V, the Cu/Zn ratio is higher than that after −1.2 V, which suggests that applied potential plays a significant role in the reconstruction process and hence the difference in selectivity. The presence of copper in the surface layer has a significant impact on the improvement of selectivity toward CO. [ABSTRACT FROM AUTHOR]

This document is the contents list for an issue of the journal Chemical Communications, published by The Royal Society of Chemistry. It includes articles on drug delivery using biocompatible covalent organic frameworks and progress in controllable bioorthogonal catalysis for prodrug activation. The journal aims to connect the world with the chemical sciences. The document also provides information about the editorial staff, subscription details, and the editorial board of the journal. It includes instructions for authors on how to submit material for publication and guidelines for reproducing the publication. The rest of the document consists of a list of articles published in the journal, along with their titles and authors. [Extracted from the article]