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In this work, we report on five novel coordination polymers (CPs) based on the linkage of the [Cd(6apic)2] building block [where 6apic = 6-aminopicolinate] by different bipyridine-type organic spacers, forming different coordination compounds with the following formulae: [Cd(μ-6apic)2]n (1), {[Cd(6apic)2(μ-bipy)]·H2O}n (2), {[Cd(6apic)2(μ-bpe)]·2H2O}n (3), [Cd(6apic)(μ-6apic)(μ-bpa)0.5]n (4) and {[Cd2(6apic)4(μ-tmbp)]·7H2O}n (5) [where bipy = 4,4′-bipyridine, bpe = 1,2-di(4-pyridyl)ethylene, bpa = 1,2-di(4-pyridyl)ethane (bpa) and tmbp = 1,3-di(4-pyridyl)propane]. Most of the synthesized compounds form infinite metal–organic rods through the linkage of the building block by the bipyridine-type linker, except in the case of compound 4 whose assembly forms a densely packed 3D architecture. All compounds were fully characterized and their photoluminescence properties were studied experimentally and computationally through density functional theory (DFT) calculations. All compounds display, upon UV excitation, a similar blue emission of variable intensity depending on the linker employed for the connection of the building units, among which compound 2 deserves to be highlighted for its room temperature phosphorescence (RTP) with an emission lifetime of 32 ms that extends to 79 ms at low temperature. These good photoluminescence properties, in addition to its stability in water over a wide pH range (between 2 and 10), motivated us to study compound 2 as a sensor for the detection of metal ions in water, and it showed high sensitivity to Fe3+ through a fluorescence turn-off mechanism and an unspecific turn-on response to Zn2+. Furthermore, the compound is processed as a paper-based analytical device (PAD) in which the phosphorescence emission is preserved, improving the sensing capacity toward Fe3+ ions. [ABSTRACT FROM AUTHOR]

This document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry." It provides a list of research papers published in the journal in 2024. The topics covered in these papers include carbon-based photoelectrochemical sensors, catalytic dehydrogenation of n-alkanes, metal-organic frameworks, and coordination polymers. The journal aims to foster connections within the global chemistry community and welcomes contributions from scientists at all career stages and countries. One of the papers explores the regulation of thermal expansion in a specific layer through axial coordination and dimensional reduction. Another paper investigates the synthesis, structure, and magnetic properties of one-dimensional lanthanide coordination polymers. The third paper focuses on the structural engineering of hollow nanorods with high-performance peroxidase-like activity for colorimetric detection. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a range of papers on various topics, such as photon upconversion, catalytic activity, structural diversity, and crystal stability. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document provides a list of papers and their authors, allowing library patrons to quickly identify articles of interest for their research. [Extracted from the article]

The New Journal of Chemistry, published by The Royal Society of Chemistry, has released its latest issue containing a variety of articles and papers on chemistry-related topics. The journal aims to connect the world with the chemical sciences and features papers on bioethanol fermentation, hydrogels in energy storage and biomedical technologies, environmentally responsible production, and other subjects. The document is a list of papers published in the journal, covering topics such as metal-organic frameworks, cycloaddition reactions, photochromic films, supercapacitors, computational predictions, catalysis, nanospheres, electrochemical sensors, and quantum dots. These papers offer valuable insights and advancements in the fields of chemistry and materials science. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a cover image and an inside cover image, both with accompanying articles. The document also lists several papers that are featured in the journal, covering topics such as crystal structures, coordination polymers, and the synthesis of various materials. The journal is published by The Royal Society of Chemistry, a leading chemistry community. [Extracted from the article]

This document is a contents list for the New Journal of Chemistry, a publication by The Royal Society of Chemistry. It includes articles covering various topics in chemistry, such as surface modulation of MXenes, synthesis of compounds, and studies on materials and their properties. The journal aims to connect the world with the chemical sciences. The listed papers in this document discuss the electrical and dielectric properties of Na2/3Mn2/3Fe1/3O2 as a cathode material for sodium-ion batteries, a fluorescent probe for monitoring lipid droplets, the effect of cis/trans isomerization on photochromic properties, and the bioactivity of benzophenazine enaminone derivatives as inhibitors of ERK2. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. The list includes various papers on topics such as molecular packing characteristics, crystal structures, photocatalytic activity, crystal growth, and more. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. [Extracted from the article]

This document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry." It features a compilation of research papers covering various topics such as metal dioxo complexes, piezo-photocatalytic CO2 reduction, and carbonaceous materials for lithium-ion batteries. The journal aims to foster connections within the chemistry community and stimulate innovative ideas. Additionally, the document includes corrections to two previously published papers. [Extracted from the article]

The document is a contents list of the New Journal of Chemistry, published on March 14, 2024. It includes a variety of articles and papers on topics such as SARS-CoV-2 detection, synthesis of branched bottlebrushes, glycosyl sulfonation, catalytic behavior, and more. The journal, published by The Royal Society of Chemistry and the Centre National de la Recherche Scientifique, aims to explore new directions in chemistry. The document provides a comprehensive overview of the articles included in the journal issue, which cover a wide range of topics and provide valuable research and insights in their respective fields. [Extracted from the article]

The document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry." It includes various articles and papers on topics such as copper complexes, lanthanide-based POMs, and coordination polymers. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. The given document is a list of papers published in the journal Dalton Transactions. The papers cover a range of topics in chemistry, including catalysis, phosphors, materials synthesis, and more. Each paper is identified by its title, authors, and page number. The document also includes a correction and a retraction for two previously published papers. [Extracted from the article]

The document is a contents list for the New Journal of Chemistry, a journal that focuses on new directions in chemistry. It includes a list of communications and papers featured in the journal, covering a range of topics such as catalysis, synthesis, and electrochemistry. The journal is published by The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. The document also mentions approved training courses offered by the Royal Society of Chemistry for professional development. The given document is a list of papers published in the New Journal of Chemistry in 2024. The papers cover a range of topics including DNA silver nanoclusters, graphene oxide synthesis, CO release from plasmonic Pt, and the construction of metal-organic frameworks. Other topics include the synthesis of magnetic porous organic polymers, coordination polymers, and hybrid gels. The document also includes a correction to a previously published paper. [Extracted from the article]

The document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry." It features articles and papers on a wide range of topics, including organometallics in molecular junctions and the synthesis of different compounds and their properties. The journal aims to promote the chemical sciences and reinvest its profits into the chemistry community. One of the articles, titled "Fedushkin," is a scientific journal published by The Royal Society of Chemistry in 2024. It provides valuable research and findings on various aspects related to the subject of Fedushkin, which may be of interest to library patrons conducting research in this field. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a list of papers featured in the issue, covering topics such as photocatalytic hydrogen generation, thermal performance of glass coatings, and Zn ion storage performance. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. The issue includes various articles and papers on topics such as organic charge transfer complexes, metal organic frameworks, mechanical properties of cocrystals, and scintillation crystals. The journal is published by The Royal Society of Chemistry, a leading chemistry community that reinvests its profits back into the chemistry community. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a list of papers featured in the issue, covering topics such as the photothermal weak absorption of a crystal, halogen bonding proclivity in cocrystals, and the structure and electrical properties of doped single crystals. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a cover image by Gonzalo Campillo-Alvarado and an inside cover image by Shuai Wang and Xiaoyang Dai. The highlighted articles in this issue include one on multiple synthesis routes for atomically precise noble metal nanoclusters by Lizhong He and Tingting Dong, and another on co-crystal formation versus boron coordination in azopyridines by Jesus Daniel Loya, Sidhaesh A. Agarwal, Nicholas Lutz, Eric W. Reinheimer, and Gonzalo Campillo-Alvarado. The document also mentions professional development opportunities and provides a list of papers featured in the journal. [Extracted from the article]

The document is a contents list for the journal CrystEngComm. It highlights the articles and papers featured in the current issue, including topics such as cobalt coordination polymers, environmental science, polymorphism, and lithium storage. The journal aims to advance the understanding and design of solid-state and crystalline materials. The Royal Society of Chemistry, a leading chemistry community, publishes the journal and reinvests its profits back into the chemistry community. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a variety of papers on topics such as cocrystals, crystal structures, stimuli-responsive properties, and piezoelectric properties. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. [Extracted from the article]

The document is a contents list for the journal CrystEngComm. It highlights various papers and communications published in the journal, including topics such as hydrogen storage, coordination polymers, luminescent sensors, and chemical solution deposition. The cover image features the Tembleque Aqueduct World Heritage Site in Mexico. The journal is published by the Royal Society of Chemistry, a leading chemistry community that connects the world with the chemical sciences. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. The list includes various papers on topics such as hybrid materials, growth of single-crystalline particles, high-pressure phase transitions, coordination polymers, and optical properties of crystals. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions professional recognition and development opportunities for scientists. [Extracted from the article]

The document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry." It includes the titles and authors of various articles published in the journal, covering topics such as the synthesis and reactivity of hydride complexes, sustainable copolymers, and the structure and behavior of various metal complexes. The journal is published by The Royal Society of Chemistry, a leading chemistry community. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. The contents list includes various papers on topics such as acoustic shockwave-induced morphological transformation, copper-organic frameworks, and the assembly of poly(3-hydroxybutyrate). The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions other journals in the field of environmental science. [Extracted from the article]

The document is a contents list for the journal CrystEngComm. It highlights various papers and articles published in the journal, including topics such as crystal growth, coordination polymers, hybrid materials, and electrocatalysts. The journal focuses on the design and understanding of solid-state and crystalline materials. The Royal Society of Chemistry, a leading chemistry community, publishes the journal and reinvests its profits back into the chemistry community. [Extracted from the article]

This paper investigates the synthesis, crystal structure, thermal properties, and energetic performance of two 1D coordination polymers (CPs). The CPs, namely, [Zn(atrz)(DNBA)2(H2O)2]n (1) and [Cd(atrz)(DNBA)2(H2O)2]n (2), were designed and synthesized based on the nitrogen-rich ligand 4,4′-azobis-1,2,4-triazole (atrz) and 3,5-dinitrobenzoic acid (HDNBA) via a mixed ligand strategy using a simple and environment-friendly method. The CPs were characterized by various spectroscopic and analytical techniques along with single-crystal X-ray diffraction (SCXRD). SCXRD analysis reveals a distorted octahedral geometry around the metal ions (Zn/Cd), leading to the formation of a 1D coordination polymer while constructing a 2D structural framework through intermolecular hydrogen bonding. Both the CPs exhibit similar thermal stability but considerably differ in their heat of formation values (1 = −894.43, 2 = 1635.93 kJ mol−1). CP 2 has higher detonation velocity (7.24 km s−1) and pressure (23.67 GPa) compared to 1 (detonation velocity: 6.28 km s−1, detonation pressure: 17.57 GPa) owing to its higher heat of formation and density. Both the CPs exhibit ideal insensitivity to friction and impact stimuli, ensuring their safety during transportation and processing. The value of average activation energy obtained from isoconversion ASTM E698 for 1 and 2 was reported to be 143.8 and 168.0 kJ mol−1, respectively. This study explores the development of energetic CPs through the mixed ligand strategy based on the atrz ligand and incorporating HDNBA as the co-ligand to reduce the sensitivity while maintaining the comparable energetic performance of previously reported atrz-based complexes. This paper also highlights the potential use of CPs as explosives by demonstrating higher energetic performance. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes articles on various topics such as thermodynamic stability relationships of cocrystals, molecular adducts of an anti-cancer drug, and the design of cocrystals featuring a modified isoniazid derivative. The journal also highlights industrial chemistry and material innovations. The document provides a list of papers and their authors, covering a range of topics related to crystal engineering and materials science. [Extracted from the article]

In this paper, we report a two-dimensional (2D) Hofmann-type spin-crossover coordination polymer [FeII(o-NTrz)2PtII(CN)4]·H2O (o-NTrz = 4-(o-nitrobenzyl)imino-1,2,4-triazole). Due to the remarkable configurational flexibility of triazole-based ligand, the porous structure of this compound can be reversibly regulated by the loss of guest water molecules as a consequence of rotation of o-NTrz. The 180° reorientation of the o-nitrobenzyl moiety not only induces a response of gate-closing/opening of the porous framework but also significantly modulates the spin transition temperature. The present investigation highlights the potential of Hofmann-type SCO compounds with flexible ligands in exploring unusual physical and chemical phenomena. [ABSTRACT FROM AUTHOR]

Urease may rapidly hydrolyze urea, causing a significant amount of ammonia to be released and decreasing the efficacy of urea fertilizers. However, urease inhibitors (UIs) can prevent the interaction between urease and urea, allowing crops to absorb ammonium nitrogen for an extended period of time. In this paper, by using different O-donor second auxiliary ligands, we have designed and synthesized two Cu-based coordination polymers (Cu-CPs) to operate as UIs by combining two aromatic carboxylic acids and a bis-pyridine-bis-amide ligand, which show excellent urease inhibitory activity. Cu-CP-1 has an obvious inhibitory effect on the inhibitory activity against jack bean urease, with the IC50 of 1 being 0.83 ± 0.01 μM while the IC50 value for Cu-CP-2 was 2.53 ± 0.01 μM, respectively. Furthermore, inhibitory activity against urease, kinetics, molecular docking, and comparisons of the title Cu-CPs and other complex-based materials have been comprehensively investigated. More importantly, the bridging atoms of μ2-OH and μ2-Cl play important roles in urease inhibition activity. The structure–function relationships were further discussed and indicate that Cu-CPs can be used as a kind of UI. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal "Dalton Transactions: An International Journal of Inorganic Chemistry," published by The Royal Society of Chemistry. It includes articles on various topics such as electrode materials for batteries, compound synthesis, and catalytic activity. The first article discusses the preparation of Au-loaded mesoporous In2O3 nanoparticles and their improved ethanol sensing performance. The second article is a correction notice regarding tubular metal organic frameworks formed from the curvature of 2D-honeycombed metal coordination. The document also mentions approved training courses offered by the Royal Society of Chemistry. [Extracted from the article]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. It includes a range of articles on various topics, such as selective recognition and reversible encapsulation of alcohol clusters, the influence of substituents on crystal structures, and the synthesis of different materials. The journal is published by The Royal Society of Chemistry, a leading chemistry community. The document also mentions approved training courses offered by the society. [Extracted from the article]

Polar cyano fragments and their isomeric isocyano counterparts have attracted great attention as stimuli-responsive luminescent materials in a wide range of fields including organic light-emitting diode devices, chemical fluorescent sensors, photoelectric semiconductors, anti-counterfeit products, etc., mainly because of their typical electron-deficient activity, noncovalent recognition ability, and variable coordination capacity. The electron-deficient and polar nature of these blocks have significant effects on the properties of the cyano/isocyano-based luminophore materials, especially concerning their condensed state-dependent electronic structures. Among them, donor–acceptor (D–A) derived unimolecular and co-assembled luminophores have attracted more attention because their large delocalized structures and noncovalent interaction recognition sites can rebuild the electronic transfer character in the aggregative state, thus endowing them with outstanding stimuli-responsive luminescent behavior via intermolecular and intramolecular charge transfer in polytropic morphologies. In this perspective paper, we give a brief introduction on stimuli-responsive organic and coordinated luminophores and the documented typical design concepts and applications in recent years. It is expected that this perspective article will not only summarize the recent developments of polar cyano/isocyano-derived luminophores and their coordination compounds via structural tailoring and self-assembly but also throw light on the future of the design of more sophisticated stimuli-responsive architectures and their versatile properties. [ABSTRACT FROM AUTHOR]

The document is a contents list for the journal CrystEngComm, which focuses on the design and understanding of solid-state and crystalline materials. The issue includes articles on topics such as protein crystallization techniques, crystal structure analysis, construction and catalytic effects of solvent-dependent products, and the discovery of new solid forms of dipeptide. The journal is published by The Royal Society of Chemistry, a leading chemistry community that invests its profits back into the chemistry community. [Extracted from the article]

The document titled "Front cover" is from the journal CrystEngComm, published on February 7, 2024. It features a paper by Jhy-Der Chen et al. on Cd(II) coordination polymers constructed from tris-pyridyl-tris-amide and polycarboxylic acid. The paper discusses the synthesis, structures, and sensing properties of these polymers. The document also promotes professional recognition and career advancement in the field of science through professional registers and chartered status. The journal is published by the Royal Society of Chemistry, a registered charity. [Extracted from the article]

CrystEngCommrsc. li/ crystengcomm ISSN 1466- 8033 Volume 26 Number 18 14 May 2024 Pages 2335– 2442 PAPER Juan Olguín et al. Nitro group and K+- based secondary building units for the self- assembly of 3D coordination polymers built on dinuclear dianionic helicate connectors Environmental Science: Atmospheres Connecting communities and inspiring new ideas rsc. li/ submittoEA Fundamental questions Elemental answers GOLD OPEN ACCESS Registered charity number: 207890 [Extracted from the article]

The "antenna effect" is one of the most important energy transfer modes in lanthanide light-emitting polymers. In this study, novel luminescent nanostructured coordination polymers (Eu–PCP) were synthesized in one step using Eu3+ as the central metal ion and 5,10,15,20-tetrakis (4-carboxyphenyl) porphyrin (TCPP) as the organic ligand. The unique "antenna effect" observed between Eu3+ and TCPP leads to a substantial improvement in the electrochemiluminescence (ECL) emission efficiency. Eu–PCP exhibits good cathodic ECL characteristics. Additionally, Au@SnS2 nanosheets exhibit favorable electrical conductivity, biocompatibility, and a significant specific surface area. This makes them a suitable choice as substrate materials for the modification of electrode surfaces and capturing antigens. Being well known, the development of sensitive and rapid methods to detect chloramphenicol is essential for food safety. Based on this, we report a novel competitive electrochemiluminescence immunoassay to achieve ultra-sensitive and highly specific detection of chloramphenicol. The linear range was 0.0002–500 ng mL−1 and the detection limit was 0.09 pg mL−1. Apart from that, the experimental results proved that it provided a new analytical tool for the detection of antibiotic residues in food safety. [ABSTRACT FROM AUTHOR]

Based on crystal engineering, three Zn/Cd-based metal--organic frameworks (MOFs) (FUM-153(Zn--H), FUM-167(Cd--H), and FUM-176(Cd--NH2)) were successfully prepared from rigid O-donor/flexible N-donor linkers (H2bdc (terephthalic acid) (L(O) H) or NH2-H2bdc (2-aminoterephthalic acid) (L(O) NH2) and bpfb (N,N'- 1,4-(phenylene) diisonicotinamide) (L(N))) with Zn/Cd ions. Structurally, the major difference among the FUMs is the various behaviors of the DMF solvent in the lattice or the coordination environment of the structures. This study investigated the effect of hydrogen bonding of NH2 substitution in 2-D layer linkers and its effect on the layer architecture. The results showed that hydrogen bonding indirectly affects the coordination of DMF solvent to the metal center and the porosity. To investigate the effect of the NH2 substitution in the presence or absence of the DMF solvent in the FUMs, the Cambridge Structural Database (CSD) was surveyed for similar structures with the L(O) H and L(O) NH2 linkers. Remarkably, the obtained data suggested that the existence of NH2 substitution may reduce the probability of the coordination of DMF to the metal centers. Theoretical studies were carried out to explore the gas adsorption performance of the title FUMs. A better CH4 adsorption compared to CO2 for all FUMs was observed. It is worth noting that CH4 and CO2 gas adsorption in FUM-176(Cd--NH2) is higher than that in FUM-153(Zn--H) and FUM-167(Cd--H). It can be deduced that the NH2 substitution in 2-D layer linkers prevented the entering of DMF molecules into the framework (lattice or coordinated solvent). Consequently, more accessible pores are provided for gas molecules. The work demonstrates the role of linker functionality in the crystal structure, pore size, and gas adsorption properties. [ABSTRACT FROM AUTHOR]

A facile and in situ successive linker replacement through single-crystal-to-single-crystal (SC--SC) transformation process in cadmium coordination networks (CNs) based on 3,6-bis(pyridin-3-yl)-1,2,4,5-tetrazine (3,3'-pytz) and 4,4'-bipyridine (4,4'-bipy) in chloroform/methanol solution is reported. In this work, we synthesized a 2D square-grid homo-linker (4,4'-bipy) coordination network of {[Cd(4,4'-bipy)2(ClO4)2] (CHCl3)4}n (1) after 24 h at room temperature. Compound 1 undergoes facile and in situ SC--SC transformation at room temperature to a 2D rectangular-grid mixed-linker (4,4'-bipy and 3,3'-pytz) coordination network of {[Cd(4,4'-bipy)(3,3'-pytz)(ClO4)2](CHCl3)(MeOH)}n (2) after two weeks through a core@shell crystal. Further, by keeping compound 2 in the mother liquor, the second SC--SC structural transformation to the 2D rhombic-grid homo-linker (3,3'-pytz) of {[Cd(3,3'-pytz)2(H2O)1.4(MeOH)0.6](3,3'-pytz)(MeOH)1.4(ClO4)2}n (3) occurs within two months. In these stepwise SC--SC transformations, we report for the first time the facile and in situ fabrication of 2D coordination networks by the replacement of linkers via the core--shell pathway. Unlike compound 3, which was stable in air, single crystals of 1 and 2 were unstable outside the mother solution, and due to the absorption of water from air, they were transformed into microcrystalline materials of {[Cd(4,4'-bipy)(H2O)2(ClO4)2](4,4'-bipy)}n (1T) and {[Cd(3,3'-pytz)(H2-O)2(ClO4)2](4,4'-bipy)}n=1 or ∞ (2T), respectively. [ABSTRACT FROM AUTHOR]

Two bidentate ligands (L1 = 1-pentyl-2-(pyridin-2-yl)-1H-benzimidazole and L2 = 1-heptyl-2-(pyridin-2-yl)-1H-benzimidazole) were employed for the synthesis of five mononuclear Fe(II) coordination compounds 1–5 containing perchlorate, tetrafluoroborate and triflate counterions. Single-crystal X-ray diffraction analysis confirmed the expected molecular structures of all the reported compounds, revealing a moderately distorted octahedral geometry of {FeN6} coordination chromophores. All five compounds exhibit thermal spin crossover with T1/2 temperatures allocated above 400 K. The theoretical calculations supported the experimental magnetic investigation and helped to explain the electronic structures of the reported complexes with respect to the occurrence of thermal spin state switching. In addition, compound 4 was employed for the preparation of Langmuir–Blodgett films and fabrication of molecular films using the method of spontaneous evaporation of the subphase. While the formation of Langmuir–Blodgett films was unsuccessful due to the instability of the compound at the water/air interface, the latter technique allowed the formation of molecular films of 4 with well-defined thickness and homogeneity. [ABSTRACT FROM AUTHOR]

Cobalt and nickel are vital metals for the transition to a decarbonized society, currently in critical supply conditions to meet future demands. The recovery of those metals from secondary sources can mitigate this issue, as well as treating hazardous waste and increasing its economic value. In this work, ionic polymers inspired by deep eutectic solvents (DES) were studied for cobalt and nickel recovery from representative recycling solutions. These polymers were prepared by simple and fast photopolymerization process combining [2-(methacryloyloxy) ethyl] trimethylammonium chloride (METAC) with a series of hydroxylated compounds (e.g. alcohol and phenolic compounds). Different driving forces for metal absorption; ionic interactions, hydrogen bonding coordination, acidity of the media and polymer swelling have been investigated. The poly(METAC:1-butanol) polymer showed the highest absorption capacity (46 ± 5 mg g−1 and 46 ± 4 mg g−1 for cobalt and nickel, respectively), competing with conventional materials. Moreover, the metal stripping and recovery step was investigated. Favourably, deionized water presented the highest desorption efficiency, in comparison with HCl, rendering this process 'greener' and highly cost-effective. Finally, the ionic polymers were successfully reused as absorbents for five absorption/desorption cycles, maintaining structural integrity. This approach can pose an alternative way of using systems inspired by DES, with application at a larger scale upon further optimizations. [ABSTRACT FROM AUTHOR]

A new type of extended viologen, N,N′-2,5-bis(3-pyridinium)thiazolo[5,4-d]thiazole dipropionate, (m-H2TTzPA)(HSO3)2 (1), was synthesized, and two new coordination polymers, {[Cd(m-TTzPA)Br2]·H2O}n (2) and {[Zn(m-TTzPA)Br2]·H2O}n (3), were prepared based on the m-TTzPA ligand. Compounds 1–3 exhibit photochromic behaviors, which were proved using single-crystal X-ray diffraction, UV-vis spectroscopy and EPR characterizations. Furthermore, all the compounds have obvious fluorescence quenching behaviors upon irradiation using a xenon lamp, where compound 1 exhibits a significant quenching efficiency of 95.84%. [ABSTRACT FROM AUTHOR]

A caged metal–organic framework based on heptanuclear and binuclear copper clusters, namely [Cu9(L)10(H2O)2][Me2NH2+]2 (Cu-MOF) (L = rigid 6-(1H-tetrazol-5-yl)-2-naphthoic acid) was synthesized and structurally characterized by a solvothermal method. Single-crystal X-ray diffraction shows that Cu-MOF displays a three-dimensional porous anionic framework and exhibits a cage-cavity structure. The tri-functional ligand uses two coordination modes to bridge different SBUs to form a dodecahedral cage. Since Cu-MOF possesses both anionic and porous frameworks, it could be used for efficient and selective absorption of cationic organic dyes. Further studies truly showed that both the charge and size of the dye molecules affect the absorption of Cu-MOF. Besides, thanks to the electronic configuration and wide range of visible light absorption properties of the heptanuclear copper clusters, Cu-MOF could be used as a photocatalyst for energy transfer from oxygen molecules to singlet oxygen, and successfully oxidized benzyl alcohol to benzoic acid in air under additive-free mild conditions. Therefore, rationally prepared Cu-MOFs, guided by crystal engineering, demonstrate potential for application as organic dye adsorption separators and photocatalysts, and the feasibility of preparing functionally tailored frameworks using tri-functional ligands consisting of tetrazolium and carboxylate acid is presented. [ABSTRACT FROM AUTHOR]

Effective adsorption of dye pollutants is essential to preserving human health and life before they are released into the environment. Ionic coordination polymers are considered good candidates for the effective elimination of dye pollutants. In this research, an anionic coordination polymer, {[NH2(CH3)2]2[Cd(μ4-L)]·1.5H2O·0.75DMF}n (1), [L4−: (E)-5,5′-(fumaroylbis(azanediyl))diisophthalate], was prepared and characterized. Structural analysis revealed that each Cd(II) ion was linked to four L4− ligands forming a 3D framework. A 2-fold interpenetrated 3D architecture of the compound was observed with a dia topology due to the large pore of a single framework. Owing to its water stability and anionic skeleton, the removal ability of four dyes with different charges and sizes by the compound was investigated. The compound, maintaining the negative charge density, effectively adsorbed the cationic methylene blue (MB) dye, while the elimination of anionic methyl orange (MO) and Congo red (CR) dyes was not observed owing to electrostatic repulsion. Additionally, the compound displayed size-dependent adsorption as evidenced by its non-adsorption of the cationic rhodamine B (RhB) dye. The compound exhibited a high MB adsorption capacity with a maximum of 689.93 mg g−1. The experimental data agreed well with the Langmuir isotherm model, and the adsorption process could be marked as a pseudo-second-order kinetic model. The MB adsorption of the compound could be attributed to electrostatic interactions due to its anionic framework and weak interactions. [ABSTRACT FROM AUTHOR]

Amphiphilic {[Cd3(L)2(phen)2(H2O)6]·2H2O·2DMF}n (1) (H3L = 1,3,5-benzenetricarboxylic acid and phen = phenanthroline) and hydrophilic [Zn3(L)2(H2O)12]n (2) were obtained via hydrothermal reactions. Compound 1 is less hydrophilic due to its hydrophobic phen ligands. Hydrogen bonds extend along one direction in compound 1 and two directions in compound 2; thus, the hydrogen bond continuity of compound 1 is less than that of compound 2. The proton conduction behaviors of the two compounds as fillers of Nafion composite membranes were studied. The results show that the optimal doping amounts of 1 and 2 are 5% and 3%, respectively, and the proton conductivities of 1/Nafion-5 and 2/Nafion-3 composite membranes are about 29% and 60% higher than the proton conductivity of the pure Nafion membrane, respectively. The relationships between the structures and properties have been explored; the inherent hydrogen bonding chains or networks in the crystal structures as well as the additional continuous hydrogen bonds formed between the hydrophilic groups on the surface of their particles and the –SO3H groups of Nafion can provide more proton transfer pathways. The higher doping amount of compound 1 was attributed to its hydrophobic phen ligand, which can promote its compatibility and interactions with the Nafion membrane and reduce aggregation. [ABSTRACT FROM AUTHOR]

The new homochiral 1D metal–organic coordination polymer {Cu[bdc-(N-MePro)H2O]·0.25H2O}n was synthesized using 2-[(1-methyl- L -prolyl)amino]terephthalic acid, which was obtained for the first time. The unique crystal structure of the new compound was determined using powder X-ray diffraction. The catalytic performance of {Cu[bdc-(N-MePro)H2O]·0.25H2O}n in the asymmetric ring opening reactions of styrene oxide and cyclohexene oxide with aniline was evaluated. [ABSTRACT FROM AUTHOR]

The 1D homochiral coordination polymer (CP-1) {[Co(dTMP)(bpe)2(H2O)3]·9H2O}n was constructed by using 2′-deoxy thymidine 5′-monophosphate disodium salt (dTMP·2Na), and auxiliary ligand bpe (1,2-bis(4-pyridyl)ethene) and characterized by single-crystal XRD, PXRD, IR, UV-visible, CD and TGA analyses. Molecular simulations revealed the selective chiral behaviour of CP-1 towards phenylalanine and histidine, as indicated by their higher binding free energies compared to other amino acids. Theoretical parameters were also compared with experimental UV-visible verdicts. Notably, the D -enantiomers of phenylalanine and histidine demonstrated strong bonding abilities and optimal configurations for probing and distinguishing them from their L -counterparts. These findings led to propositions suggesting that the dissimilarities between these D and L amino acid forms and their binding orientations with CP-1 may contribute to alterations in the CD signal. CP-1 exhibited a robust inherent circular dichroism (CD) signal in aqueous solutions, modulated by the presence of specific amino acids, namely D / L phenylalanine and D / L histidine. Leveraging the measurement of CD signal intensity, a sensor capable of detecting unmodified amino acids has been developed. Unlike previously reported approaches that relied on complex chemical reactions between initially CD-silent molecules and probed amino acids, this new method offers a more straightforward means of amplifying the CD signal. Consequently, this change facilitates a more accurate differentiation between the enantiomers of these specific amino acids compared to others. [ABSTRACT FROM AUTHOR]

Eugenol, the major constituent of clove oil, has been explored as an essential natural ingredient for ages owing to its versatile pharmacological properties. However, to date, the coordination chemistry of eugenol derivatives has not been much explored. In the present work, an eugenol-based Schiff base ligand (HL) was synthesized and structurally confirmed through ESI-MS, NMR, and FT-IR spectroscopy studies. Consequently, the N,O-donor chelating ligand HL was coordinated with Cd2+, in the presence of bridging pseudohalides (thiocyanate, SCN−, and dicyanamide, N(CN)2−) to synthesize two luminescent coordination polymers (CPs 1 and 2): [Cd2(L)2(X)2]n (where HL = 4-allyl-2-(((2-(benzylamino)ethyl) imino)methyl)-6-methoxyphenol and Xs are bridging pseudohalides, i.e., SCN− and N(CN)2−) on a Cd-eugenol scaffold. The CPs depicted structural diversity, bulk-phase purity, thermal stability, and the presence of interlayer supramolecular C–H⋯π interactions together with C–H⋯S (for CP 1) and C–H⋯N (for CP 2) interactions. The CPs further exemplified themselves as selective and sensitive 'turn-off' probes towards trinitrophenol (TNP) (quenching efficiency: 82.02% and 83.86% for 1 and 2) among a pool of hazardous nitroaromatic compounds (NACs). Accordingly, 1 and 2 exhibited an ultralow limit of detection (LOD) of 0.29 and 0.15 μM, with high quenching constants (KSV) of 5.91 × 104 and 17.60 × 104 M−1, respectively. In addition, TNP sensing events were evidenced to be recyclable and exhibited fast response (∼31 s, 1, and ∼40 s, 2), which increased its real-world viability. Vapor phase TNP sensing was also accomplished upon drop-casted CP films. Experimental investigations and theoretical DFT study confirmed the cooperative occurrence of RET-IFE-PET-collisional quenching and non-covalent π⋯π stacking as key factors involved in the TNP sensing performance. The competency of 1 and 2 in the detection of TNP from several complex environmental matrices (CEMs), viz. matchstick powder, river and sewage water, and soil specimens, was also established with good recovery (∼66–86% and ∼68–93% for 1 and 2, respectively) and high KSV values (3.90–11.39 × 104 and 6.17–18.79 × 104 M−1 for 1 and 2, respectively). [ABSTRACT FROM AUTHOR]

Two new cyano-bridged coordination polymers, {[Ni(bpe)(H2O)2][Ni(CN)4]·2H2O}n (1) and {[Cu(bpe)(H2O)2][Ni(CN)4]·ethanol}n (2) (bpe = 1,2-bis(4-pyridyl)ethane) were synthesized and characterized. This was part of a study attempting to rationalize the formation of Hofmann coordination polymers over their aqua-derivatives, in which we found that the length of the ligand does not control the outcome of the synthesis. In the initial phase of thermogravimetric analysis, compound 1 lost the guest water molecule while compound 2 lost its guest ethanol. Single crystal X-ray diffraction revealed that both compounds crystallize in P1¯ with similar unit cell parameters. In both compounds, the Ni(II) ion is coordinated with four cyanide–carbon atoms in a square planar geometry and Cu(II) or the second Ni(II) ion adopts a distorted octahedral coordination by two bpe ligands, two bridging cyano groups, and two water molecules. In both structures, chains composed of adjacent [Ni(C12H12N2)(H2O)2]2+ (for 1) or [Cu(C12H12N2)(H2O)2]2+ (for 2) are further linked together via [Ni(CN)4]2− units and extend to generate a two-dimensional framework. The presence of disordered terminal cyanide moieties in 1 could be attributed to a larger volume available to this moiety in the structure of 1. The BET surface areas of the activated phases 1′ of 1 and 2′ of 2 are 28 m2 g−1 and 5 m2 g−1, respectively, and originally, they have no pores to accommodate gas molecules at low pressure (1 atm). 1′ does not adsorb carbon dioxide at 195 K (0.30 mmol g−1), 273 K (0.086 mmol g−1) and 298 K (0.056 mmol g−1), or hydrogen at 77 K, but it shows an affinity to adsorb nitrogen (around 2.5 mmol g−1) at 77 K and water vapor molecules (around 0.95 mmol g−1) at 298 K with typical type-II isotherms. 2′ adsorbs a small quantity of water vapor (around 0.20 mmol g−1) at 298 K and does not adsorb carbon dioxide at 195 K (0.125 mmol g−1), 273 K (0.069 mmol g−1) and 298 K (0.062 mmol g−1), or hydrogen at 77 K, but shows more affinity to adsorb nitrogen (around 1.2 mmol g−1) at 77 K. [ABSTRACT FROM AUTHOR]

The detection of excess toxic anions or cations in an aqueous solution through various fluorescent materials such as organic or inorganic fluorescent materials has aroused significant interest recently. Herein, a new tetraimidazole ligand 1,3-bis(1-imidazolyl)-5-[3,5-bis(1-imidazolyl)-phenoxymethyl]-benzene (timpb) and its two Cd(II) metal–organic frameworks {[Cd2(1,4-bdc)2(timpb)]·5.5(H2O)}n (1) (1,4-benzenedicarboxylic acid = 1,4-H2bdc) and {[Cd2(4,4′-bpdb)2(timpb)]·(MeCN)·2.5(H2O)}n (2) (4,4′-biphenyldicarboxylic acid = 4,4′-H2bpdb) were synthesized. Through X-ray single crystal diffraction analysis, 1 can be considered as a 2-fold interpenetrating pillared-bilayer framework formed by linking [Cd2(1,4-bdc)4]n layers with pairs of timpb ligands, whereas 2 exhibits a 2-fold interpenetrating 3D honeycombed framework formed by linking [Cd(4,4′-bpdb)]n chains with timpb ligands. The solid-state luminescent properties of timpb, 1 and 2 at ambient temperature were also investigated. Moreover, timpb acted as a potential luminescent sensor for the detection of cations Fe3+ or Cu2+ and the anion Cr2O72−, whereas 1 displayed high sensitivity toward the cation Fe3+ and anion Cr2O72−. [ABSTRACT FROM AUTHOR]

Three new nonporous mercury(II) coordination polymers (CPs) containing the ditopic 1,1′-(1,4-phenylene)bis(3-(pyridin-4-yl)urea) ligand (4,4-pbubp), namely, {[Hg(4,4-pbubp)Cl2](DMSO)3}n (CP1), {[Hg(4,4-pbubp)Br2](DMSO)3}n (CP2) and {[Hg(4,4-pbubp)I2](DMSO)4}n (CP3) were synthesized and characterized structurally through infrared analysis, elemental analysis (CHNS), TGA, PXRD and single-crystal X-ray diffraction analysis. All of these compounds formed 1D polymeric zigzag chains self-assembled in the crystal into higher-dimensional structures through various hydrogen-bonding interactions involving the urea functional group and several DMSO solvent molecules. These CPs were examined as potential adsorbents for the reversible uptake of iodine from the solution. Theoretical analysis of the adsorption kinetics and isotherms was applied to examine the iodine adsorption data. The results correlated effectively with the pseudo-second-order kinetic model and the Freundlich isotherm model. Our results showed that in this family, the iodine uptake capacity was dependent on the anion (CP1 > CP2 > CP3), and the compound which contained chloride anions (CP1) showed the highest capacity to remove iodine. The maximum uptake capacity of 262.01 mg g−1 iodine over CP1 at room temperature based on the Freundlich model was achieved. After iodine adsorption, compounds@I2 were characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDAX) as well as Raman spectroscopy. [ABSTRACT FROM AUTHOR]