Indium(III) hetero-ligand complexes containing 1,10-phenanthroline, chloride, acetonitrile and dimethyl sulfoxide: Crystal structure determination, and luminescent properties

چکیده مقاله

[In(Me ₂phen)Cl ₃(DMSO)]·DMSO complex (1) (Me ₂phen is 5,6-dimethyl-1,10-phenanthroline and DMSO is dimethyl sulfoxide) and [In(Ph ₂phen)Cl ₃(CH ₃CN)] complex (2) (Ph ₂phen is 4,7-diphenyl-1,10-phenanthroline) were prepared from the reaction of 5,6-dimethyl-1,10-phenanthroline and 4,7-diphenyl-1,10- phenanthroline with InCl ₃·4H ₂O in methanol, respectively. Both complexes were characterized by IR, UV-Vis, NMR and luminescence spectroscopy and their structures were studied by the single-crystal diffraction method. In the crystal structure of complex 1, there are intra- and intermolecular C-H⋯Cl and C-H⋯O hydrogen bonds and π-π contacts. In complex 2, there are intermolecular C-H⋯Cl hydrogen bonds. The luminescence emission spectra of Me ₂phen and 1, and Ph ₂phen and 2, were obtained in DMSO and CH ₃CN at room temperature, respectively. The shapes of the emission spectra for Me ₂phen, Ph ₂phen, 1 and 2 are similar but the luminescent emission of complexes of 1 and 2 are weaker than those of free Me ₂phen and Ph ₂phen ligands. There are red shifts of the emission energies of the Ph ₂phen ligand after coordination to In(III) for complex 2. © 2012 - IOS Press and the authors. All rights reserved.