title: Sensitized near-IR luminescence of lanthanide complexes based on push-pull diketone derivatives.
abstract: Lanthanide complexes with two push-pull diketone derivatives as sensitizers have been developed as synthons for near-infrared emitting materials. The ligand substituents consist of a carbazole moiety with hole-transport properties and an aromatic or heteroaromatic unit. According to quantitative NMR analysis and complementary HPLC experiments, the diketones are predominantly in their enolic form in polar solvents such as THF and MeCN at room temperature. The preferred cis-enol form contributes strongly to the binding of lanthanide ions (Ln = Nd, Gd, Er). The resulting tris(diketonate) ternary complexes with terpyridine (Ln = Nd, Er) display sizeable near-IR emission with long luminescence lifetimes.
authors.affiliation: IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon, 305-700, Korea.
authors.forename: Nam Seob
authors.initials: NS
authors.lastname: Baek
authors.forename: Yong Hee
authors.initials: YH
authors.lastname: Kim
authors.forename: Yu Kyung
authors.initials: YK
authors.lastname: Eom
authors.forename: Jung Hwan
authors.initials: JH
authors.lastname: Oh
authors.forename: Hwan Kyu
authors.initials: HK
authors.lastname: Kim
authors.forename: Annina
authors.initials: A
authors.lastname: Aebischer
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gumy
authors.forename: Anne-Sophie
authors.initials: AS
authors.lastname: Chauvin
authors.forename: Jean-Claude G
authors.initials: JC
authors.lastname: Bünzli
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D019265:Spectroscopy, Near-Infrared
chemical_list: D056831:Coordination Complexes; D007659:Ketones; D028581:Lanthanoid Series Elements; D008024:Ligands