An interpenetrated 2D coordination polymer: A candidate for gas adsorption of small molecules

The Co{[14HBDC][14BDC]0,5[INH]} (1) coordination polymer was synthesised by a solvothermal route using the ligands 1,4-benzenedicarboxylic acid [14BDC], isonicotinylhydrazine [INH] and Co(NO3)·6H2O. It was characterised by elemental analysis (CHN), infrared vibrational spectroscopy, thermal analysis (TGA, DrTGA and DSC) and single-crystal X-ray diffraction analysis. In this coordination polymer, the ligand INH is coordinated to the metal site in two ways, acting as a bridging ligand. Unlike INH, 14BDC acts as a bridging ligand between two metal sites, coordinated in a bidentate manner, and between a metal site by a carboxyl group. According to the X-ray diffraction analysis, this compound is an interpenetrated 2D coordination polymer with pores along the crystallographic axis c. These small pores have interesting potential application in the adsorption of small gas molecules, such as H2.