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A novel 3D Zn-based coordination polymer (NH 2 -LCU-110 , LCU names Liaocheng University) with the formula [Zn(L1)(bpea) n (H 2 L1 ​= ​2-aminoterephthalic acid, bpea ​= ​1,2-bis(4-pyridyl)ethane), was hydrothermally synthesized from a flexible nitrogen-containing carboxylic acid ligand with various coordination modes as main ligands and nitrogen-containing auxiliary ligand with different structures. NH 2 -LCU-110 demonstrates an interesting 5-fold interpenetrating diamond structure. Luminescence measurements reveal that this complex has obvious emission enhancement and quenching towards Al3+ and Cu2+, respectively. The mixed matrix membranes (MMMs) incorporating NH 2 -LCU-110 and poly(methyl methacrylate) (PMMA) as well as simple test papers were both prepared for potential application. The MMMs can quickly detect Al3+ and Cu2+ and the original emission could be regenerated by lifting from the analytical solutions, demonstrating its fast response and good selectivity. The sensing mechanism was investigated in details by various measurements and compared with isostructural complex LCU-110 without –NH 2 groups. All observations indicate that introduction of Lewis basic –NH 2 groups can enhance the intermolecular interactions between the frameworks of coordination polymers and sensing analytes (Al3+ and Cu2+). An amino-functionalized coordination polymer NH 2 -LCU-110 exhibits luminescence turn-on/off toward Al3+/Cu2+, and its mixed matrix membranes and test papers were prepared. [Display omitted] • An amino-functionalized coordination polymer was employed as a multiresponsive luminescence sensor. • NH 2 -LCU-110 exhibits luminescence turn-on and turn-off behavior toward Al3+ and Cu2+, respectively. • Mixed matrix membranes (MMMs) and test papers made the detection more simple and convenient. [ABSTRACT FROM AUTHOR]

A novel multifunctional coordination polymer {[Zn(HCOO) (bcbpy)Cl]·H 2 O} n (1) with multiple colour-changing has been synthesized from Zn(NO 3) 2 ·6H 2 O, and viologen ligand 1,1′-bis-((3-carboxylatobenzyl)-4,4′-bipyridinium) dichloride (H 2 bcbpy·2Cl). In coordination polymer (CP) 1 , bcbpy ligands bridge Zn2+ cations to form a 1D wave-like chain. CP 1 exhibited photochromic properties under xenon lamp and blue light irradiation while obtaining a structurally stable light product 1T. CP 1 thermochromic properties can also be observed during heating. 1 showed photo-controlled fluorescence properties during color rendering and decolorization, and its properties were studied. Interestingly, CP 1 can be deposited in filter paper by coating it with a solution of H 2 O. The filter paper can be used as a printing medium without ink. [Display omitted] • CP 1 was synthesized using viologen ligand 1,1′-bis-((3-carboxylatobenzyl)-4,4′-bipyridinium) dichloride (H 2 bcbpy·2Cl). • CP 1 exhibited photochromic properties under xenon lamp and blue light irradiation. • CP 1 obtaining a structurally stable light product 1T after irradiation. • CP 1 can be used as a good ink-free printing medium. [ABSTRACT FROM AUTHOR]

Constructing nanoscale coordination polymers (CPs) with different micro- or nanoscale morphologies and sizes is crucial for the functionalization of CPs-based heterogeneous catalysts. Herein, surfactant polyvinylpyrrolidone (PVP), surface-supported frameworks (filter paper or Ni foam), and Co-based CPs (1), [Co 2 (pdpa)(py) 4 (H 2 O)] n (H 4 pdpa ​= ​5,5'-(pentane-1,2-diyl)-bis(oxy)diisophthalic; py ​= ​pyridine)) were employed to develop highly ordered micro- or nanoscale CPs, achieving microscale 1a (without surface-supported framework) and nanoscale 1b-c (filter paper and Ni foam as surface-supported frameworks for 1b and 1c , respectively). Furthermore, the catalytic performance of nanoscale 1c with spheric particles for the tandem conversion reactions of aromatic nitriles and diamines into imidazoline or tetrahydropyrimidine frameworks was much more prominent than that of large scale 1 , microscale 1a , and nanoscale 1b because of the easily accessible catalytic active sites in the nanoscale spheric particles, which offered a functionalizable platform for the tandem reactions by minimizing the diffusion distance but did little for their activity. By introducing surfactant and surface-supported frameworks, different morphologies and particle sizes of Co-based CPs with micro- or nanoscale 1a-c were constructed and were used as efficient heterogeneous catalysts to execute tandem conversion reactions. [Display omitted] • A new Co-based CPs was constructed under solvothermal conditions. • Co-based CPs with different morphologies and particle sizes were obtained. • The catalytic performance of all the prepared particles for tandem reactions was conducted. [ABSTRACT FROM AUTHOR]

Multistimuli responsive materials based on the viologen coordination polymers have attracted much interest in the past few years due to the increasing demand for smart materials. In this paper, based on a viologen ligand 1-(3-carboxybenzyl)- 4,4′-bipyridinium chloride (Hcbbpy) and zinc(II) ion, a new crystalline complex, namely, {[Zn(cbbpy)Cl 2 ]·H 2 O} n (1) has been designed and synthesized. In complex 1 , every cbbpy ligand as a bridge links two Zn2+ ions via carboxylate O atom and pyridine N atom to extend to a 1D zigzag chain. The 1D chains are extended to 3D supramolecular structure through π···π stacking and hydrogen bonding. More importantly, 1 exhibits fast photochromic behaviors in response to UV and X-ray due to the formation of viologen radicals. Complex 1 also shows photo-modulated luminescence property in the solid state. In addition, complex 1 can be deposited on filter paper and displays the potential application as inkless print material. [Display omitted] • A new viologen complex was successfully synthesized and characterized. • Complex 1 shows fast response to UV light and X-ray irradiation. • Complex 1 can be deposited on filter paper and displays as inkless print material. [ABSTRACT FROM AUTHOR]

Metal-organic frameworks (MOFs) have been widely used in filed of electrochemistry. Compared with traditional inorganic porous materials, the polyvalent pyridinecarboxylic acid ligands have many advantages which contains more active sites, flexible coordination mode, adjustable structure. Therefore, it becomes good choice for constructing MOFs materials with excellent performance. In this paper, a novel MOF was synthesized by pyridine polycarboxylic acid ligand and CoCl 2 ·6H 2 O using solvothermal method. The physicochemical properties were characterized by FT-IR, powder diffraction and thermogravimetry. Single crystal X-ray diffraction reveal that MOF-1 crystallizes in monoclinic system with P 2 1 / C space group. The central Co2+ ions have a dual core structure with 5 and 6 coordination, respectively. The carboxyl groups show two kinds of coordination modes μ 2 : η1: η1 and μ 2 : η1: η2, and the pyridine N atoms also coordinate to form a three-dimensional network structure. Electrochemical experiments show that MOF-1 has a lower overpotential (339.4 mV) and Tafel slope (65.3 mV·dec−1) with higher ECSA and better OER kinetics. A large number of exposed active sites indicate that the MOF has higher potential as catalyst for oxygen evolution reaction. [Display omitted] • A Co-MOFs based on pyridine polycarboxylic acid ligand were prepared by a simple hydrothermal method. • Electrochemical test show that the MOFs has a lower overpotential and Tafel slope with higher ECSA and better OER kinetics. • MOFs exhibit a porous three-dimensional network structure. [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 inhibit the interaction between urease and urea so that ammonium nitrogen can be absorbed by crops for a long time. In this paper, we developed and fabricated two Cu-based coordination polymers (Cu-CPs) to function as UIs by combining two aromatic carboxylic acids and a bis-pyridine-bis-amide ligand, which demonstrate outstanding urease inhibitory efficacy. Cu-CP-1 exhibits a pronounced inhibitory effect on the inhibitory activity of jack bean urease while the semi-inhibitory concentration (IC 50) value was 0.74 ± 0.01 μM, whereas the IC 50 value of Cu-CP-2 was 4.77 ± 0.51 μM. Furthermore, inhibitory activity against urease, kinetic, molecular docking, and comparisons of the title Cu-CPs and other complex-based materials have been comprehensively investigated. More importantly, the oxygen atoms of μ 2 -OH and –COO play important roles in urease inhibition activity. The structure–function relationship were further discussed which indicates that Cu-CPs can be used as a kind of UIs. By using different O-donor second auxiliary ligands, we have designed and synthesized two Cu-based CPs to operate as urease inhibitors which show excellent urease inhibitory activity. [Display omitted] • The development of UIs has been a matter of great concern to researchers. • Two Cu-CPs have been synthesized by using diverse O-donor ligands. • The Cu-CPs are served as UIs and show excellent urease inhibitory activity. • Inhibitory activity, kinetic, molecular docking of the Cu-CPs have been studied. [ABSTRACT FROM AUTHOR]

To search for more high-performance crystalline proton conducting materials and to accelerate the related research progress, in this paper, a one-dimensional coordination polymer (CP), [Co(BBOT) 2 (H 2 O) 3 ·2H 2 O] n (1) (H 2 BBOT = N-benzoyl-N′-(4-benzoxy)thiourea) was firstly prepared by solvent volatilization approach. Subsequently, the thermal, H 2 O and chemical stabilities of the CP were tested and its high structural stability was confirmed. Furthermore, in 1 , a stable solid three-dimensional framework can be constructed by intermolecular H-bonds and stacking interactions between phenyl units. Then, utilizing the AC impedance determination, the dependence of the proton conductivity of this CP on temperature and humidity in the water vapor environment was explored and the positive correlation was verified. Excitingly, the optimized proton conductivity of this compound under specific test conditions (100 °C/98 % relative humidity) can be as high as 10−4 S/cm, being in the forefront of similar crystalline solid materials. Finally, according to the value of activation energy and the characteristics of crystal structure, we speculate on the proton conduction mechanism. Proton conductivity of a CP under variable humidity and temperatures was explored. Its highest proton conductivity can attain up to 10−4 S/cm, and its proton-conduction mechanism was speculated. [Display omitted] • One carboxylate-based Co(II) coordination polymer was prepared. • Its structure was characterized by single-crystal X-ray diffraction. • Its water-assisted proton conduction was explored. • The proton-conducting mechanism was speculated. [ABSTRACT FROM AUTHOR]

In this paper, two unique 3D MOFs, namely, {[Cd 5 (L) 2 (H 2 O) 16 ]·4H 2 O} n (1), {[Pb 5 (L) 2 (H 2 O) 2 ]·6H 2 O} n (2) were obtained by taking advantage of 2,4-di(3′,5′-dicarboxylphenyl)benzoic acid (H 5 L) and Cd(Ⅱ), Pb(Ⅱ) metal ions under solvothermal conditions. The coordination diversity of the H 5 L ligand gives rise to two distinct coordination modes in 1 – 2 , which contributes to the MOFs with multifarious structures. Complex 1 exhibits a 3D 5-connected topology, and Cd(Ⅱ) metal ions of 1 show three different coordination geometries. 2 displays a 3D (2,3,4,7)-connected net on the basis of penta-nuclear [Pb 5 (μ 1 -COO) 5 (μ 2 -COO) 5 ] clusters, as well the structure of complex 2 contains specific 1D Pb– O –Pb chains. A room temperature, 1 – 2 shows eminent solid-state luminescence properties and the maximum emission peaks are ∼416 ​nm & ∼429 ​nm respectively. At the same time, due to the luminescence quenching effect of complex 1 , it reveals excellent selectivity and sensitivity for Fe3+ cations and Cr 2 O 7 2− anions with low detection limit. The fluorescence quenching mechanisms of complex 1 were also lucubrated. In this paper, two unique 3D MOFs, namely, {[Cd 5 (L) 2 (H 2 O) 16 ]·4H 2 O} n (1), {[Pb 5 (L) 2 (H 2 O) 2 ]·6H 2 O} n (2) were obtained by taking advantage of 2,4-di(3′,5′-dicarboxylphenyl)benzoic acid (H 5 L) and Cd(Ⅱ), Pb(Ⅱ) metal ions under solvothermal conditions. The coordination diversity of the H 5 L ligand gives rise to two distinct coordination modes in 1 – 2 , which contributes to the MOFs with multifarious structures. Complex 1 exhibits a 3D 5-connected topology, and Cd(Ⅱ) metal ions of 1 show three different coordination geometries. 2 displays a 3D (2,3,4,7)-connected net on the basis of penta-nuclear [Pb 5 (μ 1 -COO) 5 (μ 2 -COO) 5 ] clusters, as well the structure of complex 2 contains specific 1D Pb– O –Pb chains. A room temperature, 1 – 2 shows eminent solid-state luminescence properties and the maximum emission peaks are ∼416 ​nm & ∼429 ​nm respectively. At the same time, due to the luminescence quenching effect of complex 1 , it reveals excellent selectivity and sensitivity for Fe3+ cations and Cr 2 O 7 2− anions with low detection limit. The fluorescence quenching mechanisms of complex 1 were also lucubrated. [Display omitted] • Two novel 3D LMOFs were constructed based on a symmetrical V-shaped rigid pentacarboxylic acid ligand. • Complexes 1 and 2 feature 3D frameworks based on diverse metal chains and clusters with high open metal sites. • 1 – 2 shows eminent solid-state luminescence properties at room temperature. • Complex 1 has high selectivity and sensitivity to detect Fe3+ and Cr 2 O 7 2− ions with low detection limit. [ABSTRACT FROM AUTHOR]

Two water-stable Cd(II)-MOFs, [CdL 0.5 (H 2 O)] (1) and {[Cd 3 (H 2 L)(dtb) 2 (H 2 O)]·3H 2 O} n (2) [H 4 L ​= ​1,1'-(ethane-1,2-diyl)bis (1H-imidazole-4,5-dicarboxylic acid); H 2 dtb ​= ​1,4-di (1H-tetrazol-5-yl)benzene) has been hydrothermally synthesized and characterized by elemental analyses, IR, TG, and X-ray single-crystal diffraction. Complex 1 exhibits a 3D 6-connected framework based on L4− ligands μ 6 -linking [Cd 2 O 2 ] unit, and complex 2 possesses a 3D (3,8)-connected porous framework built by H 2 L2− and dtb2− ligands bridging [Cd 3 O 2 ] units. The luminescence properties were investigated, showing that 1 and 2 can display high sensitivity and selectivity for detecting Fe3+, Cr(VI) and MnO 4 − ions in aqueous solutions via luminescence quenching effects. Furthermore, possible sensing mechanism was investigated in this paper. Two water-stable luminescent Cd(II)-MOFs has been hydrothermally synthesized by using a new flexible ligand (H 4 L) containing two H 2 IDC groups. Complex 1 exhibits a 3D 6-connected framework based on L4− ligands μ 6 -linking [Cd 2 O 2 ] unit, and complex 2 possesses a 3D (3,8)-connected porous framework built by H 2 L2− and dtb2− ligands bridging [Cd 3 O 2 ] units. Luminescence sensing performances reveal that two complexes behave satisfactory recognition and detection effect toward Fe3+, Cr(VI) and MnO 4 − ions with low detection limit and high sensitivity, which may be acted as potential multi-responsive luminescence sensing materials. Furthermore, possible sensing mechanism was investigated in this paper. [Display omitted] • A new ligand containing two H 2 IDC groups was firstly employed to construct MOFs. • Two water-stable Cd(II)-MOFs have been hydrothermally synthesized. • Complexes 1 and 2 exhibited 3D porous frameworks, respectively. • Both 1 and 2 displayed potential multi-responsive luminescence sensing capabilities. [ABSTRACT FROM AUTHOR]

In this paper, two novel 1D uranyl coordination polymers, [(UO 2)(HPDTC)(H 2 O)]Cl (1) and [(UO 2)(DPA)(H 2 O) (2) based on pyridine acid have been synthesized using hydrothermal method. The structure was obtained with the help of a Single Crystal X-ray diffraction meter and further characterized by IR, UV–vis, TG and others. The compounds show good luminescence properties and the uranium center exhibits the same pentagonal bipyramid coordination geometry among the compounds. Their electrochemical properties have been investigated through Cyclic Voltammetry (CV) and Galvanostatic Charge/Discharge (GCD). It reveals the counterion ions in compound 1 improve the electrical properties as the capacity is 56.94 ​F ​g−1. Two novel 1D uranyl coordination polymers based on pyridine acids have been synthesized using the hydrothermal method and further characterized by IR, UV–vis, TG and others. The uranium center of the two compounds exhibits the same pentagonal bipyramid coordination geometry according to the results of the Single-crystal X-ray diffraction. Their electrochemical properties have been investigated through Cyclic Voltammetry (CV) and Galvanostatic Charge/Discharge (GCD), and it reveals the counterion ions in compound 1 improve the electrical properties as the capacity is 56.94 ​F ​g−1. [Display omitted] • Two novel uranium derivatives based on pyridine carboxylic have been synthesized. • The compounds with charming fluorescence properties because of the uranium. • The electrochemistry properties were studied and compound 1 with a capacity of 56.94 Fg-1. [ABSTRACT FROM AUTHOR]

The synthesis of crystalline homochiral MOF materials is very important for their potential application in enantioselective processes and asymmetric catalysis. In this paper, four novel zinc based chiral boron imidazolate frameworks (BIFs), Zn 2 [BH(2-eim) 3 ](BA) 2 (OH) (BIF-132-BA , 2-eim ​= ​2-ethylimidazolate, BA ​= ​benzoate), Zn[HBH(2-ipim) 3 ](OHBA)(Ac) (BIF-133-OHBA , 2-ipim ​= ​2-isopropylimidazolate, OHBA ​= ​ o -hydroxybenzoate, Ac ​= ​acetate), Zn[HBH(2-ipim) 3 ](PHBA)(Ac) (BIF-133-PHBA , PHBA ​= ​ p -hydroxybenzoate), and Zn[HBH(2-ipim) 3 ](DHBA)(Ac) (BIF-133-DHBA , DHBA ​= ​2,4-dihydroxybenzoate) were prepared via solvothermal synthesis. Single-crystal X-ray diffraction demonstrated that the existence of hydrogen bonds between adjacent chains results in two different structure features of BIF-131 : a chiral ladder-like 1D chain (BIF-133-OHBA) and two supramolecular 2D layers (BIF-133-PHBA and BIF-133-DHBA). Then, the optical activities of as-synthesied crystals were preliminarily studied by circular dichroism (CD) spectroscopy. In addition, because they crystallized in noncentrosymmetric space groups, the powder second-harmonic generation (SHG) measurements were carried out and the SHG response of BIF-133-PHBA was almost comparable to potassium dihydrogen phosphate (KDP). Four novel zinc based chiral boron imidazolate frameworks (BIFs), were prepared from the potential chiral substrate of tridentate boron imidazoate ligands. The solid-state CD spectra indicate that the as-synthesized crystals of are optically active. Furthermore, due to their noncentrosymmetric space group, samples of BIF-133-PHBA were selected for the SHG measurements, which is the first example for BIFs used in NLO materials. [Display omitted] • Four novel zinc based chiral boron imidazolate frameworks (BIFs), were prepared from the potential chiral substrate of tridentate boron imidazoate ligands. • The solid-state CD spectra indicate that the as-synthesized crystals of are optically active. • The first examples for BIFs used in NLO materials. [ABSTRACT FROM AUTHOR]

In this paper, a zinc(II)-based coordination polymer, Zn 2 [(C 6 H 8 (COOH) 2 ] 2 (1) [(C 6 H 8 (COOH) 2 ​= ​1,2-cyclopentanedicarboxylic acid, CPDA)], was successfully synthesized by solvothermal method. Thereafter, 1 was characterized by single crystal and powder X-ray diffraction, elemental analysis, thermogravimetric analysis and infrared spectrum techniques. In the hypoglycemic experiment, the results showed that 1 could effectively increase the glucose uptake in insulin resistance (IR)-type HepG2 cells. Besides, 1 displayed favorable antidiabetic activity in contrast to the Zinc nitrate and the CPDA ligand. The mechanism of 1 to alleviate insulin resistance might be related to the reduction of the intracellular reactive oxygen species (ROS) level and the regulation of the ROS/JNK/AKT signaling pathway. Zn 2 (CPDA) 2 alleviated the insulin resistance by reducing of the intracellular reactive oxygen species (ROS) level and the regulation of the ROS/JNK/AKT signaling pathway. [Display omitted] •A zinc-based coordination polymer, [Zn 2 (CPDA) 2 ] (1), was synthesized. • 1 was found to have high antidiabetic effect to HepG2 cells. •The antidiabetic mechanism might be related to the ROS production. [ABSTRACT FROM AUTHOR]

The three multi-dimensional coordination polymers, [Mn 2 (μ 4 -dttpa)(μ 6 -dttpa)(H 2 O) 2 ] n (1), {[Co(μ 4 -dttpa)(H 2 O) 2 ]·2H 2 O} n (2), and {[Zn 3 (μ 4 -dttpa) 2 (μ 2 -dttpa)(phen) 2 (H 2 O) 2 ]·2H 2 O} n (3) (H 2 dttpa ​= ​2,5-di(1H-1,2,4-triazol-1-yl)terephthalic acid; phen ​= ​1,10- phenanthroline), are successfully synthesized and characterized by X-ray single crystal diffraction, powder X-ray diffraction (PXRD), FT-IR spectra, elemental analysis and thermogravimetric analysis. Structurally, complex 1 is a three-dimensional structure with the 3-nodal Schläfli point symbol of {4·63·82} 2 {42·62·82}{62·84}. Complex 2 displays a two-dimensional network with a 6-connected uninodal net. With the point symbol of {4·62} 2 ·{43·63} 2 ·{44·62}{6}, complex 3 shows the two-dimensional stacking pattern. Temperature-dependent magnetic data of complexes 1 and 2 indicate antiferromagnetic behaviors between adjacent metal ions from 2 ​K to 300 ​K. Further magnetic studies show that the best fitting parameters of comple× 1 are obtained using the dinuclear Mn(II) model. From 50K to 300K, complex 2 displays antiferromagnetism over its mononuclear analogue with the zero-field splitting parameter (|D| ​= ​35.2 ​cm−1). The luminescent intensity of complex 3 is much stronger than that of free ligand (H 2 dttpa) and auxiliary ligand (phen). Moreover, the photoluminescence mechanism of complex 3 has been analyzed by theoretical calculation at ωB97XD/6–311++g(2d,p) level with DFT and TDDFT, which reveals that luminescence emission of 3 is attributed to the ligand-to-ligand charge transfer (π∗ phen -π dttpa2-). Compared with the free ligand, the enhancement of the luminescent intensity of compound 3 might occur due to the construction of Zn(II) ion, dttpa2− and phen increases the efficiency of charge transfer between LUMO and HOMO in the solid state. [Display omitted] • The luminescence mechanism of Zinc(II) compound has been elaborated by DFT and TDDFT analysis. • Summary and comparison of dttpa2− complexes in this paper and published in literature. • A new coordination mode μ 2 -(η1)-(η1) of dttpa2− in the solid state is first published. [ABSTRACT FROM AUTHOR]

Molecule-based room temperature phosphorescence (RTP) materials have attracted considerable attention owing to their extensive applications in the optoelectronic and biological field. In this paper, two isostructural coordination polymers [Zn 3 (TIB) 2 X 6 ] (X ​= ​Cl, 1-Cl ; X ​= ​Br, 1-Br) have been synthesised and characterized by the assemble of triangular D-A-D ligand 1,3,5-tri(1H-imidazol-1-yl)benzene (TIB) and ZnX 2 salts. The incorporation of halogen atoms play significant role in the formation of abundant C-H···X hydrogen-bonding interactions and dense structures, enable high thermal stability of the two complexes. 1-Br shows phosphorescence lifetime three order of magnitude longer than that of 1-Cl , and obviously phosphorescence emission recognized by naked eyes. The theory calculations reveal complete separation of molecular orbitals between halogen atoms and TIB ligand. Photoelectron response performance have also been studied. This work provides an efficient way to achieve long-last RTP by the incorporation of metal-bromide units in the coordination polymers. Herein, two [ZnX 2 ] based isostructural coordination polymers (X ​= ​Cl, 1-Cl ; X ​= ​Br, 1-Br) have been reported. 1-Br shows obviously phosphorescence emission by naked eyes and lifetime three order of magnitude longer than that of 1-Cl. [Display omitted] • Two [ZnX 2 ] based isostructural MOFs (X ​= ​Cl, 1-Cl ; X ​= ​Br, 1-Br) have been successfully synthesised. • 1-Br shows long-lived phosphorescence lifetime three orders of magnitude longer than 1-Cl. • The long-last yellow-green emission can be directly observed by naked eyes after removing the light source. [ABSTRACT FROM AUTHOR]