Two copper coordination polymers with pyridine imine-based ligand: Synthesis, crystal structure and luminescent properties

Two new copper coordination polymers [(Cu2L)-L-I(SCN)(2)](n) (1) and {[(CuL2)-L-II(NO3)(2)]center dot 2H(2)O}(n) (2), have been synthesized and characterized by IR, elemental analysis, XRPD, TG technique and X-ray crystallography, where L is N,N'-bis-(1-pyridin-4-yl-ethylidene)-hydrazine. Polymer 1 displays a new 3D inorganic-organic hybrid network generated through the coordination interactions between 2D inorganic sheets Cu(I)-(1,1,3-mu-SCN-) and bidentate bridging ligands L with two terminal monodentate pyridyl N donors. Each Cu(I) center adopted a distorted tetrahedral environment. The structure of polymer 2 is a 2D layer network containing tetrametallic quadrangular ring units [(Cu4L4)-L-II], in which each copper(II) atom is linked by four terminal monodentate pyridyl N-donors from four twist ligands and two oxygen atoms from two NO3-. The luminescent properties of polymers 1 and 2 were investigated in the solid state at room temperature. (C) 2012 Elsevier B.V. All rights reserved.