Ultrafast Energy Transfer between the 3MLCT State of [RuII(dmb)2(bpy-an)]2+ and the Covalently Appended Anthracene
- 1 March 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry A
- Vol. 109 (11) , 2472-2475
- https://doi.org/10.1021/jp044444j
Abstract
The time scale for triplet−triplet energy transfer (EnT) between a Ru(II) chromophore and a ligand bound anthracene acceptor in [RuII(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 ππ* 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.Keywords
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