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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]

Abstract This paper explains the crystal structure analysis of Ag(I) coordination polymers based on 4-Amino-3-halobenzonitrile ligands. Three coordination polymers of general formula [Ag(L x)]NO 3 , where X = Cl(1), I(3) and [Ag 2 (L x)][NO 3 ] 2 , where X = Br(2), were synthesized and characterized by single crystal X-ray crystallography. The effect of changing the single halogen atom of 4-Amino-3-halobenzonitrile on the crystal packing of a series of Ag(I) coordination polymers was studied. Our results revealed that N-H···O hydrogen bonds play important role in the crystal packing. Nanoparticles of these coordination polymers were also synthesized by ultrasonic irradiation of (1) , (2) and (3) , and characterized using different analytical techniques. Graphical abstract In this paper, we investigated the synthesis and characterization of three new Silver (I) coordination polymers containing 4-Amino-3- halobenzonitrile ligands with different halogen substituents. Herein, Compounds 1, 2 and 3 were synthesized by reaction of AgNO3 with LCl, LBr and LI respectively. These compounds are completely characterized by the elemental analysis, FT-IR spectroscopy and single crystal X-ray crystallography. fx1 [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]

Abstract Four new coordination polymers, namely, [Zn 2 (L) 2 (1,3-bdc)(H 2 O) 2 ] n (1) , [Cd 2 L 2 (Cl) 2 ] n ·0.5nH 2 O (2) , [Cd 2 L 2 (adip)] n ·2nH 2 O (3) , and [CdLCl] n (4) were solvothermally synthesized by reaction of Zn(NO 3) 2 ·6H 2 O, CdCl 2 ·H 2 O with an asymmetrical rigid N-heterocyclic carboxylatic acid (HL), where HL = 1-(4-carboxylphenyl)-3-(prazin-2-yl)-1H-1,2,4-triazole, 1,3-bdc = benzene- 1,3-dicarboxylic acid, H 2 adip = adipic acid, H 2 glu = glutaric acid. Compound 1 is a 1D ladder chain. Compound 2 is a (3,6)-connected network with the Point symbol of (42·6) 2 (44·62·88·10). Compound 3 displays a intriguing (3,3,4,4)-connected topological net with the Point symbol of (4·64·8)(4·72)(42·6·72·9)(42·6). Compound 4 presents a new (3,5)-connected topological net with the Point symbol of (3·4·5)(32·4·5·62·74). In addition, the thermal stabilities and photoluminescence properties of these compounds were also studied. Dramatically, compound 3 shows the high selectivity and sensitivity for Fe3+ cation via a luminescence quenching effect. Graphical abstract In this paper, we have synthesized four new Zn/Cd compounds based on HL, namely, [Zn 2 (L) 2 (1,3-bdc)(H 2 O) 2 ] n (1) , [Cd 2 L 2 (Cl) 2 ] n ·0.5nH 2 O (2) , [Cd 2 L 2 (adip)] n ·2nH 2 O (3) , [CdLCl] n (4). Meanwhile, the luminescence properties and thermal stabilities of 1 – 4 were also studied. Compound 3 shows the high selectivity and sensitivity for Fe3+ cation, via a luminescence quenching effect. fx1 Highlights • Four new coordination polymers were solvothermally synthesized. • HL ligand displays multiple coordination modes. • Compound 3 shows the high selectivity and sensitivity for Fe3+ cation. [ABSTRACT FROM AUTHOR]

In this paper, two isostructural Co/Ni-based coordination polymers [Co(Htzbt)(bpy)] n (1) and [Ni(Htzbt)(bpy)] n (2) have been synthesized by solvothermal method using 2-(1H-1,2,4-triazol-1-yl)benzene-1,3,5-tricarboxylic acid (H 3 tzbt) and 4,4′-Bipyridine (bpy) as mixed ligands. The two compounds exhibited three dimensional (3D) pillared-layer structure and relative high water-stability. Interestingly, through rationally selection of functional ligand and metal ions, isolated N sites and carboxylic acid sites as well as unsaturated metal sites were combined in the structure of the final compounds. Benefit from these multiple active centers in the framework, the as-synthesized compounds exhibit enhanced catalytic activity in both cycloaddition of CO 2 with epoxides and hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol. In particular, compound 1 showed superior catalytic performance under mild conditions. Additionally, 1 could maintain relative high efficiency for at least four cycles, exhibiting potential application in practical catalysis. In this paper, two isostructural 3D pillared-layer Co/Ni-based coordination polymers, namely [M(Htzbt)(bpy)] n (M ​= ​Co2+, 1 ; M ​= ​Ni2+, 2) have been synthesized, which show good catalytic activity in both cycloaddition of CO 2 with epoxides and hydrogenation of 4-nitrophenol to 4-aminophenol, due to the multiple active sites inside their structures. Image 1 • Two Co/Ni-based coordination polymers have been successfully synthesized based on H 3 tzbt and bpy ligands. • The two compounds ​present similar 3D pillared-layer frameworks, which are stable against hot and humid conditions. • Multiple active centers have been designed within the frameworks as potential catalytic sites. • The two compounds ​also exhibit good catalytic properties. • The unique structures endow ​the compounds ​with multifunctional applications. [ABSTRACT FROM AUTHOR]

A new XRD experiment and crystal structure refinement was performed for the earlier published compound in the paper “Heterobimetallic coordination polymers involving 3d metal complexes and heavier transition metals cyanometallates” by Peresypkina et al. (2015) [1]. A choice of a crystal cell taking in consideration the superstructural reflections allowed to obtain more reliable data about the symmetry and bond distances in the heterometallic 2D framework {[Ni(cyclam)] 2 [ReO(OH) 0.5 (MeOH) 0.5 (CN) 4 ]} 2.5+ . Additionally, doubling of the parameter c permitted to get more details about interlayer space. As a result, disordered perchlorate anions and solvate molecules were located. [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]

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]