Studies of impulsive vibrational influence on ultrafast electronic excitation transfer |
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Authors: | Biggs Jason D Cina Jeffrey A |
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Institution: | Department of Chemistry and Oregon Center for Optics, University of Oregon, Eugene, Oregon 97403, USA. |
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Abstract: | We investigated electronic energy-transfer dynamics in three model dimers within which coherent intramonomer nuclear motion had been induced by impulsive Raman excitation using an optimized, electronically preresonant control pulse. Calculations of the donor-survival probability, the ultrafast pump-probe signal, and the pump-probe difference signal are presented for dithia-anthracenophane and homodimers of 2-difluoromethylanthracene and 2-trifluoromethylanthracene. Survival probabilities and signals, along with phase-space analyses, elucidated the mechanisms, extent, and spectroscopic manifestations of external vibrational or torsional control over electronic excitation transfer. |
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