Abstract
We report coherent nuclear dynamics coupled with photoinduced electron transfer using a newly designed donor-acceptor system with a strong electronic coupling. Our results by femtosecond spectroscopy show that the ultrafast electron transfer (~ 110 fs from Si and ~60 fs from S2) was independent of solvent properties. Moreover, the electron transfer was accompanied by temporal phase shift of the selective porphyrin vibrational modes. The reaction coordinate for ultrafast electron transfer was shown to involve coherent intramolecular motions of the selective modes rather than stochastic solvation dynamics.
© 2004 Optical Society of America
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