title: Synthesis and characterization of electrochemiluminescent ruthenium(II) complexes containing o-phenanthroline and various alpha-diimine ligands.
abstract: A series of o-phenanthroline-substituted ruthenium(II) complexes containing 2,2'-dipyridyl, 2-(2-pyridyl)benzimidazole, 2-(2-pyridyl)-N-methylbenzimidazole, 4-carboxymethyl-4'-methyl-2,2'-dipyridyl, and/or 4,4'-dimethyl-2,2'-dipyridyl ligands were synthesized and examined as potent electrochemiluminescent (ECL) materials. The characteristics of these complexes, regarding their electrochemical redox potentials and relative ECL intensities for tripropylamine were studied. As found in a 2,2'-bipyridyl-substituted ruthenium(II) complexes, a good correlation between the observed ECL intensity and the donor ability of alpha-diimine ligands was observed, i.e., the ECL intensity of the Ru(II) complex decreased with an increase in the ligand donor ability. The ECL efficiency increased as the number of substitutions of o-phenanthroline (o-phen) to metal complexes increased.
authors.affiliation: Department of Chemistry, Kwangwoon University, Seoul 139-701, South Korea.
authors.forename: Byeong Hyo
authors.initials: BH
authors.lastname: Kim
authors.forename: Do Nam
authors.initials: DN
authors.lastname: Lee
authors.forename: Hae Jin
authors.initials: HJ
authors.lastname: Park
authors.forename: Jung Hyo
authors.initials: JH
authors.lastname: Min
authors.forename: Young Moo
authors.initials: YM
authors.lastname: Jun
authors.forename: Se Jong
authors.initials: SJ
authors.lastname: Park
authors.forename: Won-Yong
authors.initials: WY
authors.lastname: Lee