title: Cyclometalated Ru(II) complexes with improved octahedral geometry: synthesis and photophysical properties.
abstract: Cyclometalated bis-tridentate ruthenium(II) complexes incorporating 2,6-diquinolin-8-ylpyridine ligands and exhibiting broad visible absorptions are described. A [Ru(N(wedge)N(wedge)N)(N(wedge)C(wedge)N)](+) complex based only on ligands with expanded bite angles has a metal-to-ligand charge-transfer excited-state lifetime of 16 ns, which is attributed to a strong ligand field and therefore reduced deactivation via metal-centered states.
authors.affiliation: Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 751 20 Uppsala, Sweden.
authors.forename: Michael
authors.initials: M
authors.lastname: Jäger
authors.forename: Amanda
authors.initials: A
authors.lastname: Smeigh
authors.forename: Florian
authors.initials: F
authors.lastname: Lombeck
authors.forename: Helmar
authors.initials: H
authors.lastname: Görls
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Collin
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Sauvage
authors.forename: Leif
authors.initials: L
authors.lastname: Hammarström
authors.forename: Olof
authors.initials: O
authors.lastname: Johansson