Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 34, Pages 12500-12503Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja4037498
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Funding
- National Science Foundation [0847216]
- Alfred P. Sloan Research Fellowship
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0847216] Funding Source: National Science Foundation
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Photophysics of the MLCT excited-state of [Ru(bpy)(tpy)(OH2)](2+) ( 1) and [Ru(bpy)(tpy)(OD2)](2+) (2) (bpy = 2,2'-bipyridine and tpy = 2,2':6',2 ''-terpyridine) have been investigated in room-temperature H2O and D2O using ultrafast transient pump-probe spectroscopy. An inverse isotope effect is observed in the ground-state recovery for the two complexes. These data indicate control of excited-state lifetime via a pre-equilibrium between the (MLCT)-M-3 state that initiates H-bond dynamics with the solvent and the (MC)-M-3 state that serves as the principal pathway for nonradiative decay.
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