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Abstract: Two isostructural 3D coordination polymers (CPs) {[M(L242)2](ClO4)2} n (MII=CdII for 1 and ZnII for 2) have been constructed from metal perchlorates and a tripyridyltriazole ligand 4-(4-pyridyl)-3,5-bis(2-pyridyl)-1,2,4-triazole (L242). The host framework of each CP comprises two interpenetrating lvt topological networks. Three types of 1D channels with different chirality (achirality and left-handed or right-handed helicity) are observed to hold the perchlorate guest anions. Interestingly, both CPs materials have the exclusive and irreversible anion-exchange behaviors for acetate (OAc−), which however, are unavailable to chloride (Cl−), fluoroborate (BF4 −), or nitrate (NO3 −) anion. CPs 1 and 2 also show ligand-based solid-state fluorescent emissions at room temperature. [Copyright &y& Elsevier]

Abstract: Syntheses and characterization of two pairs of Cu(II) and Cd(II) coordination polymers with di-3-pyridinylmethanone revealed that variation the counter anion from to does not change the structures of Cu(II) complexes, but it lowers the dimensionality of the Cd(II) framework. [Copyright &y& Elsevier]

Abstract: The two Cd(II) and Co(II) 2-D frameworks have been prepared by means of self-assemblies of Cd(II) or Co(II) salts and 1-substituted imidazole and terephthalic acid, and structurally characterized by X-ray diffraction analyses. In complex 1 2-D frameworks with rhombic cavity are formed, in which the each top point of rhombus contains one hexa and two heptacoordinated Cd(II). In complex 2 2-D networks with rectangular cavities are formed, and the opposite benzene rings from carboxyls in each rectangular cavity are parallel. [Copyright &y& Elsevier]