Crystal Growth, Characterization and Photocatalytic Dye Degradation Studies of a Coordination Polymer of Cd(II) with Thiophene-2,5-dicarboxylic Acid and Nicotinamide

Abstract

A new coordination polymer of Cd(II) of formula {[Cd(TDC)(Nic)(H2O)]·3H2O}n (H2TDC = thiophene-2,5-dicarboxylic acid and Nic = nicotinamide) has been prepared by gel diffusion method. Various analytical techniques such as elemental analysis, single crystal X-ray diffraction, thermogravimetry, FT-IR and UV-visible spectroscopy were used for the characterization of the compound. In the crystal structure, the Cd-thiophene-2,5-dicarboxylate units extend to form 1D chains. Interconnections of 1D chains by the carbonyl oxygen and nitrogen from the pyridine ring of nicotinamide molecules provide a ladder-like structure that possesses 1D channels. Extensive hydrogen bonding results in the formation of a layered structure. Photocatalytic dye degradation property of the coordination polymer was investigated by using methylene blue under sunlight. Photoluminescence and thermal studies were also carried out.