- Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur (C.G)
- Received 30 January 2017, Revised 14 March 2017, Accepted 20 March 2017, Available online 22 March 2017
Abstract
Three new copper(I) coordination polymers [Cu2(µ-L)(µ-I)2)(PPh3)2]n(1), [Cu2(µ-L) (µ-Br)2(PPh3)2]n (2) and [Cu2(µ-L)(µ-Cl)2(PPh3)2.CH3CN]n (3) have been synthesized by reactions of CuX (X = I, Br and Cl) with PPh3 and the polydentate azino-pyridyl ligand L. These complexes have been characterized by elemental analyses, IR, UV–Vis and NMR spectroscopy. The crystal structures of the complexes 1 and 3 have been determined by single-crystal X-ray analysis and it has been found that these are 1-D co-ordination polymers containing bridged halide ions as well as the azino-pyridyl ligand L. Matching of X-ray powder patterns and theoretical studies reveal that the complex 2 is also a 1-D co-ordination polymer. The ligand L is non-emissive at room temperature in dichloromethane, whereas the complexes 1, 2 and 3 are photoluminescent. The E1/2values of the CuI-CuII couple for 1, 2 and 3 are within 0.75-0.8 (vs. Ag/AgCl in 1 M KCl, scan rate 100 mV s-1. DFT and Hirshfeld surface studies have also been performed for 1, 2 and 3.
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