A two-dimensional manganese coordination polymer: Crystal structure, proton conductivity and catalytic property

Abstract

Herein, we report a new Manganese coordination polymer, Mn3L2(H2O)4·2H2O (1), based on the 4′-(1-H-tetrazol-5-yl)-[1,1′-biphenyl]-3,5-dicarboxylic acid (H3L) ligand under solvothermal condition. 1 shows a two-dimensional layer structure and has strong interaction with the guest water molecules by the Hydrogen-bond network. Moreover, 1 exhibits good proton conductivity with a value of 1.59 × 10−5 S cm−1 under 98% RH at 75 °C. The proton conduction mechanism can be viewed as vehicle mechanism due to the lattice water in the structure of 1. In addition, after removed the water molecules, the open metal sites at the metal nodes of 1 can be used as Lewis acidic active sites and used as heterogeneous catalyst for the cyanosilylation reaction with good reactivity. We anticipate this work can encourage the investigation of the properties of the coordination polymers assembled by tetrazole derivative ligands.