title: Ultrafast energy transfer between the 3MLCT state of [Ru(II)(dmb)2(bpy-an)]2+ and the covalently appended anthracene.
abstract: The time scale for triplet-triplet energy transfer (EnT) between a Ru(II) chromophore and a ligand bound anthracene acceptor in [Ru(II)(dmb)2(bpy-an)]2+ (dmb = 4,4'-dimethyl-2,2-bipyridine; bpy-an = 4-(9-anthrylethylene), 4-methyl-2,2-bipyridine) has been measured using femtosecond transient absorption spectroscopy. The appearance of the anthracene excited state is monitored following photoexcitation to a metal-to-ligand charge transfer (MLCT) state via the pi pi* absorption of the triplet excited state of anthracene. Our time-resolved experiments show the presence of fast, sub-100 ps energy transfer to the anthracene occurring on two characteristic time scales of 23 and 72 ps.
authors.affiliation: Los Alamos National Laboratories, Los Alamos, New Mexico 87545, USA.
authors.forename: Jon R
authors.initials: JR
authors.lastname: Schoonover
authors.forename: Dana M
authors.initials: DM
authors.lastname: Dattelbaum
authors.forename: Anton
authors.initials: A
authors.lastname: Malko
authors.forename: Victor I
authors.initials: VI
authors.lastname: Klimov
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Meyer
authors.forename: David J
authors.initials: DJ
authors.lastname: Styers-Barnett
authors.forename: Erika Z
authors.initials: EZ
authors.lastname: Gannon
authors.forename: Jeremy C
authors.initials: JC
authors.lastname: Granger
authors.forename: W Steven
authors.initials: WS
authors.lastname: Aldridge
authors.forename: John M
authors.initials: JM
authors.lastname: Papanikolas