Cyclometalated Ru(II) complexes with improved octahedral geometry: synthesis and photophysical properties.
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.
Jäger
Michael
M
Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 751 20 Uppsala, Sweden.
Smeigh
Amanda
A
Lombeck
Florian
F
Görls
Helmar
H
Collin
Jean-Paul
JP
Sauvage
Jean-Pierre
JP
Hammarström
Leif
L
Johansson
Olof
O