title: A 3.0 micros room temperature excited state lifetime of a bistridentate RuII-polypyridine complex for rod-like molecular arrays.
abstract: A bistridentate RuII-polypyridine complex [Ru(bqp)2]2+ (bqp = 2,6-bis(8'-quinolinyl)pyridine) has been prepared, which has a coordination geometry much closer to a perfect octahedron than the typical Ru(terpyridine)2-type complex. Thus, the complex displays a 3.0 mus lifetime of the lowest excited metal-to-ligand charge transfer (3MLCT) state at room temperature. This is, to the best of our knowledge, the longest MLCT state lifetime reported for a RuII-polypyridyl complex at room temperature. The structure allows for the future construction of rod-like, isomer-free molecular arrays by substitution of donor and acceptor moieties on the central pyridine units. This makes it a promising photosensitizer for applications in molecular devices for artificial photosynthesis and molecular electronics.
authors.affiliation: Department of Photochemistry and Molecular Science, The Angström Laboratories, Uppsala University, Box 523, SE-751 20 Uppsala, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Abrahamsson
authors.forename: Michael
authors.initials: M
authors.lastname: Jäger
authors.forename: Tomas
authors.initials: T
authors.lastname: Osterman
authors.forename: Lars
authors.initials: L
authors.lastname: Eriksson
authors.forename: Petter
authors.initials: P
authors.lastname: Persson
authors.forename: Hans-Christian
authors.initials: HC
authors.lastname: Becker
authors.forename: Olof
authors.initials: O
authors.lastname: Johansson
authors.forename: Leif
authors.initials: L
authors.lastname: Hammarström