Structure and self-assembly synthesis of a novel heterometallic one-dimensional coordination polymer: {[Cu(II)(DETA)I·DMF]2[Pb2I6]} n

A novel organic–inorganic hybrid coordination polymer {[Cu(II)(DETA)I·DMF]2[Pb2I6]} n (DETA = diethylene triamine, DMF = N,N′-dimethyl formamide) was synthesized by the reaction of CuSO4·6H2O, DETA, Pb(NO3)2 and NaI in DMF/H2O mixed solvent at room temperature. Structural characterization of X-ray single diffraction reveals that the polymeric negative chain [Pb2I6] n 2− is built up by face-sharing of PbI6 octahedrons. Upon the hydrogen bonds interaction between N–H···I and N–H···O, structure-directing reagent chain {[Cu(II)(DETA)I·DMF]2} n 2+ presents one-dimension arrangement. Structure-directing reagent chains and polymeric negative chains are in combination with each other by static attracting force to form the so-called hybrid structure. The title compound was further characterized by IR, EA, UV-Vis and fluorescence spectrum.