Synthesis, structure and electrochemical properties of three metal cobalt complexes

Abstract

Three novel coordination polymers(CPs), namely, [CoL(bibp)]·2DMF(1)、[CoL(bpmp)0.5]·2H2O (2) and [Co2L2(bidpe)2]·H2O (3), (H2L = 4,4'-(phenylazanediyl)dibenzoic acid, bibp = 4,4′-bis(imidazole-1-yl)biphenyl), bidpe = 4,4′-bis(imidazole-1-yl) dipheny ether and bpmp = 1,4-bis(pyridin-4-ylmethl)piperazine), have been synthesized under hydrothermal conditions with different solvents and decreased temperature rates. Compounds 1∼3 were also characterized by FT-IR spectroscopy, elemental analyses, thermal analysis, power X-ray diffraction(PXRD) and thermogravimetric analyses(TGA). Compound 1 displays a 3-fold interpenetrate 2D layer and contains two kinds helical chains. Compound 2 shows a 3D framework. Compound 3 views of 2-fold 1D chains are mutually interpenetrate each other from 2D sheets. Furthermore, the electrochemical behaviors of the CPs 1–3 prove that they possess good electrochemical properties.