Fabrication of a halopyridine appended Co(II) based 1D coordination polymer for efficient charge transportation

Abstract A new halopyridine appended Co(II) based coordination polymer (CP), [Co(3-clpy)2(fum)2(H2O)2]n (1) {3-clpy = 3-Chloropyridine and H2fum = fumaric acid} has been synthesized and characterized by elemental analysis and single crystal X-ray diffraction (SCXRD) technique. Compound 1 crystallizes in monoclinic space group P21/c. Herein, the ditopic linker H2fum acts as brdging ligand in the formation of a one dimensional (1D) CP. The 1D chains are interconnected via hydrogen bonding interactions leading to 2D sheet. The 3-clpy ligands of one chain facilitate π⋯π stacking interactions with adjacent chain leading to 3D supramolecular assembly which generally promotes better charge transport in the material. Hirshfeld surface analysis has also been performed to check the non covalent interactions in the crystal packing. Interestingly, the compound 1 shows electrical conductivity and reveals Schottky barrier diode behavior.