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

[In(Me(2)phen)Cl-3(DMSO)]center dot DMSO complex (1) (Me2phen is 5,6-dimethyl-1,10-phenanthroline and DMSO is dimethyl sulfoxide) and [In(Ph(2)phen)Cl-3(CH3CN)] complex (2) (Ph(2)phen 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 InCl3 center dot 4H(2)O 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 center dot center dot center dot Cl and C-H center dot center dot center dot O hydrogen bonds and pi-pi contacts. In complex 2, there are intermolecular C-H center dot center dot center dot Cl hydrogen bonds. The luminescence emission spectra of Me(2)phen and 1, and Ph(2)phen and 2, were obtained in DMSO and CH3CN at room temperature, respectively. The shapes of the emission spectra for Me(2)phen, Ph(2)phen, 1 and 2 are similar but the luminescent emission of complexes of 1 and 2 are weaker than those of free Me(2)phen and Ph(2)phen ligands. There are red shifts of the emission energies of the Ph(2)phen ligand after coordination to In(III) for complex 2.