or NCS− as coligands: synthesis, spectral characterization, electrochemistry and luminescence properties![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
A series of copper(II) complexes [Cu(L1 or L2 or L3)(PPh3)2(N3)2] (1a–3a) and [Cu(L1 or L2 or L3)(PPh3)2(NCS)2] (1b–3b) (where L1 = 4-(4′-phenyl,2′-thiazolylazo)chlorobenzene, L2 = 4-(4′-phenyl,2′-thiazolylazo)bromobenzene, and L3 = 4-(4′-phenyl,2′-thiazolylazo)iodobenzene) have been prepared and characterized on the basis of microanalytical data, molar conductances, magnetic moments, UV-Vis, infrared, and ESR spectra. On the basis of electronic spectra and magnetic susceptibility octahedral geometry has been proposed for the complexes. The ESR spectral data provide information about their structures on the basis of Hamiltonian parameters and degree of covalancy. The electrochemical behavior of the complexes showed that the redox responses of Cu(II) complexes shifted to more negative potential with decrease in electron-withdrawing substituents on the azo ligands. Complexes exhibit blue-green emission with high-quantum yield.