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Abstract: The new complex {[Cu(dde)(bpe)]·H2O} n (1) (dde=4,4′-dicarboxydiphenyl ether, bpe=1,2-bis(4-pyridyl)ethene) has been synthesized and characterized. It exhibits a novel (2D→3D) three-fold parallel interpenetrating architecture that is obtained for the first time from the self-assembly of grid-containing 2D (4,4) layer motifs. The fluorescent property of 1 is discussed. [Copyright &y& Elsevier]

Abstract: The self-assembly of Cu2+ ions with malate and 1,3-bis(4-pyridyl)propane (bpp) affords a 3D coordination polymer {[Cu(Hmal)(bpp)·6H2O]} n (1) (malic acid=H3mal). The metal ions were interconnected by α- and β-carboxylate of malate produce infinite [Cu(C4H4O5)] n layers, which were further pillared by bridging ligand bpp molecules to form a 3D interpenetrating network. Of further interest, lattice water molecules form 1D infinite water tapes in 1D open cavities. [Copyright &y& Elsevier]

To seek novel dysprosium based single-molecule magnets, a dinuclear dysprosium complex, namely [Dy 2 (L) 2 (DBM) 2 (DMF) 2 ]·2DMF ( 1 ) was successfully obtained by employing tridentate Schiff base ligand (where H 2 L = 2-hydroxy-N′’-(2-hydroxy-3-methoxybenzylidene) benzohydrazide), HDBM = dibenzoylmethane, DMF = dimethylformamide). Single-crystal X-ray structural analysis reveals that the key feature of 1 is neutral dinuclear complex, in which two Dy(III) ions with eight-coordinated environment are bridged by two phenoxido oxygen atoms from two Schiff base ligands. Interestingly, complex 1 could be regarded as the structurally related derivatives to our previous reported complex of [Dy 2 (L) 2 (DBM) 2 (DMF) 2 ] ( 1a ) but adding two guest DMF solvents. More importantly, the energy barrier to magnetic relaxation of 1 is slightly higher, with a value of 33 K, when compared to the corresponding complex 1a of 24 K, which provides a good example towards regulating magnetization dynamics in dinuclear dysprosium (III) single-molecule magnets by guest solvent molecules. [ABSTRACT FROM AUTHOR]

Two new thioether tricarboxylic acid ligands have been designed and used to fabricate Cu-based CPs. Different substituent groups in ligands lead to not only the different valences of copper ions but also different clusters for CPs 1 and 2. CP 1 shows fluorescent sensing toward Fe3+ and Cr 2 O 7 2− ions with good selectivity and low detecting limit. • Two thioether tricarboxylic acid ligands with different substituent groups were designed. • Different substituent groups in ligands lead to monovalent Cu+ and divalent Cu2+ CPs. • Cu(I)- and Cu(II)-CP contains novel hexanuclear [Cu 6 (CO 2) 6 and dinuclear [Cu 2 (CO 2) 4 clusters, respectively. • Cu(I)-CP exhibits fluorescence sensing for Cr 2 O 4 2− and Fe3+ ions. Two new symmetrical tripod thioether tricarboxylic acid ligands, 1,3,5-tris(4-carboxyphenylsulfanylmethyl) benzene and 1,3,5-tris(4-carboxyphenylsulfanylmethyl)-2,4,6-trimethylbenzene (H 3 L and CH 3 -H 3 L) have been designed and synthesized. The reaction of two ligands with Cu2+ ions afforded two Cu-based cluster coordination polymers (CPs), [Cu 3 L] n (1) and {[Cu(CH 3 -HL)DMF]·DMF} n (2). It was interesting to note that the substituent groups on central phenyl rings in ligands caused the bend tripodal and planar geometries as well as different coordinated modes for H 3 L and CH 3 -H 3 L, respectively, leading to different structures of CPs 1 and 2. 1 with monovalent Cu+ ions shows a 3D layer-stacking framework with hexanuclear [Cu 6 (CO 2) 6 clusters, while 2 with divalent Cu2+ ions forms a 1D chain with dinuclear [Cu 2 (CO 2) 4 paddlewheel clusters. 1 shows strong orange fluorescence and exhibits fluorescence sensing for Cr 2 O 4 2− and Fe3+ ions with good selectivity and sensitivity. [ABSTRACT FROM AUTHOR]

Abstract: A new two-dimensional Cu(I)-framework [Cu3(deppz)(mtta)I] (1) [(Hdeppz=3,5-diethyl-4-(4-pyridyl)-pyrazole, Hmtta=5-methyltetrazole] has been solvothermally synthesized and structurally characterized. The framework contains an unprecedented cyclic Cu4(μ-pz)2(μ-mtta)2 cluster (Cu 4 ) with twelve-membered coplanar Cu4N8 metallocycle, which contains coordinatively unsaturated Cu(I) centers and acts as a soft π-acid motif to contact with iodine atoms from Cu2I2 dimer of adjacent layers, generating a 3D supramolecular framework. The framework exhibits high thermostability and bright green-blue solid-state luminescence. [Copyright &y& Elsevier]

Abstract: The first transition–metal coordination polymer {[Cd2L2(H2O)2]·2H2O} n (1) based on a new 1,2,4-triazole derivatives H2L (H2L=3-(pyrid-2-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazole) is presented, which not only exhibits an example assembled from 1D [Cd1L] chains to 3D (3,4)-connected network linked through [Cd2(trz)]2 dimeric units, but also shows high thermal stability and strong photoluminescence at room temperature. [Copyright &y& Elsevier]

Abstract: Three coordination polymers containing 2-(2-pyridyl)benzimidazole (PyHBIm) ligand, namely {[Zn3(PyBIm)3(PyHBIm)2(tma)(H2O)]•H2O}n (1), [Zn(PyHBIm)(oba)]n (2), [Cd(PyHBIm)(oba)]n (3), (tma=trimesate, oba=4,4′-oxybis-(benzoate)), have been prepared through hydrothermal reaction. Compound 1 exhibits one-dimensional (1D) helical structure. However, compounds 2 and 3 display 1D meso -helical structure. These 1D structures are further assembled into three-dimensional (3D) networks through aromatic π–π stacking interactions and hydrogen bonding interactions. Moreover they all exhibit strong photoluminescence at room temperature and may be good candidates for potential luminescence materials. [ABSTRACT FROM AUTHOR]

Two different alkaline earth metal coordination polymers (AE-CPs) {[Ca 3 L 2 (H 2 O) 6 ]·2H 2 O} n (1) and [Sr(H 2 L) 2 ] n (2) were constructed from using 5-(ethyl oxamate)-isophthalic acid (H 2 EtL) ligand with alkaline earth metal ions Ca2+ and Sr2+ under solvothermal conditions, respectively. Among them, L and H 2 L are formed by in-situ hydrolysis of H 2 EtL, which display multiple kinds of coordinated modes through oxamate and carboxylate groups. 1 and 2 both show three-dimensional coordination frameworks possessing unprecedented (3,4,5)-connected skg1 topology and (3,6)-connected ant topology, respectively. The solid-state fluorescence properties of 1 and 2 were studied, and 1 with bright blue luminescence reveals selective sensing toward Fe3+ ion in water with the low detection limit (LOD) of 1.04 × 10−3 M. Two new AE-CPs were constructed from a new oxamate-dicarboxylic ligand, revealing novel 3D frameworks and strong luminescent properties. In addition, 1 shows fluorescent sensing toward Fe3+ ion in water with good sensitivity and recyclability. Unlabelled Image • Two novel coordination polymers based on alkaline earth metal ions and a new oxamate-dicarboxylate ligand. • Two coordination polymers reveal diverse topologies due to different coordinated modes of ligands. • Ca-complex shows selective luminescence sensing toward Fe3+ ion in water. [ABSTRACT FROM AUTHOR]