title: Synthesis and physico-chemical studies of cyclometalated heteroleptic iridium(III) complexes.
abstract: Phosphorescent studies of 2-arylimidazole heteroleptic cyclometalated iridium(III) complexes with picolinic acid as the ancillary ligand were made. The observed experimental data reveals that these complexes possess dominantly (3)MLCT and (3)π-π* excited states and the solvent shift of these complexes are interpreted by Reichardt-Dimroth and Marcus solvent functions. The results are consistent with prior assignments on the absorption band to a metal-to-ligand charge transfer excited state associated with chelating ligand. Emission kinetic studies exploited that the radiative transition (k(r)), increases with increasing λ(emi).
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamilnadu, India. jtchalam2005@yahoo.co.in
authors.forename: Jayaraman
authors.initials: J
authors.lastname: Jayabharathi
authors.forename: Venugopal
authors.initials: V
authors.lastname: Thanikachalam
authors.forename: Natesan
authors.initials: N
authors.lastname: Srinivasan
authors.forename: Karunamoorthy
authors.initials: K
authors.lastname: Jayamoorthy
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D007495:Iridium / Q000737:chemistry*; D008024:Ligands; D008163:Luminescent Measurements; D010848:Picolinic Acids / Q000138:chemical synthesis / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D056831:Coordination Complexes; D007093:Imidazoles; D008024:Ligands; D010848:Picolinic Acids; D007495:Iridium; C030614:picolinic acid