Flexible bis(pyridyl-tetrazole) ligand-induced ring-containing metal–organic coordination polymers: synthesis, structures, and properties

Abstract

<p>Three coordination polymers (CPs), [Co(3-bptzp)(BDC)] (<b>1</b>), [Zn(3-bptzp)(BDC)] (<b>2</b>), and [Cd(3-bptzp)(BDC)] (<b>3</b>) (3-bptzp = 1,4-bis(5-(3-pyridyl)tetrazolyl)propane, H₂BDC = 1,3-benzenedicarboxylic acid), were synthesized under hydrothermal conditions. The CPs were structurally characterized by single-crystal X-ray diffraction, infrared spectroscopy (IR), elemental analyses, and powder X-ray diffraction (PXRD). Complexes <b>1–3</b> represent the first examples of CPs based on the flexible bis(pyridyl-tetrazole) 3-bptzp. Structure analyses reveal that <b>1–3</b> are 1-D ring-containing polymeric chains. For <b>2</b> and <b>3</b>, adjacent 1-D chains are extended to 2-D supramolecular networks by hydrogen bonding. Dye adsorption properties of <b>1–3</b>, electrochemical properties of <b>1</b>, and fluorescent-sensing behaviors of <b>2</b> and <b>3</b> have also been investigated.</p