Supramolecular Structure, Thermal and Spectroscopic Properties of a New Coordination Polymer: Catena-Bis(μ₂-4,4′-dipyridyldisulfide-κ²N,N′)-Bis(AQUO)-Copper(II)di-trifluoromethanesulfonate

Abstract

A new supramolecular network of copper (II), [{Cu(bpds)₂(H₂O)₂}] • 2CF₃SO₃]_n, (I), (bpds = 4,4′-bipyridildisulfide) has been synthesized and characterized by elemental analysis and Fourier transform infrared (FT-IR) and its structure determined using X-ray crystallography. The thermal decomposition mechanism of the complex was studied by using thermogravimetry-derivative thermogravimetry (TG-DTG) techniques. X-ray structural analysis revealed that the coordination polymer displays 1D chains. The octahedral O₂N₄ chromophore surrounding the metal ion forms via two trans located water oxygen and four nitrogen from four bpds ligand. The structure consists of Cu(H₂O)₂ fragments linked by pairs of bpds ligand to form a double-stranded chain. The thermogravimetric analysis indicates sequential loss of adsorbed and coordinated water and triflate counter ion, prior to more comprehensive ligand fragmentation at elevated temperatures.

Keywords:

• Coordination polymers
• crystal structure
• thermal analysis

Acknowledgments

This work was supported by a grant from the Universidad de Antofagasta (DI-1324-06). The authors thanks the Spanish Research Council (CSIC) for the provision of a free-of-charge license for the Cambridge Structural Database system. JV & JA thanks the Universidad de Antofagasta for a PhD fellowship.

Notes

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