Intramolecular vibrational dephasing obeys a power law at intermediate times

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Abstract

Experimental intramolecular vibrational dephasing transients for several large organic molecules are reanalyzed. Fits to the experimental data, as well as full numerical quantum calculations with a factorized potential surface for all active degrees of freedom of fluorene indicate that power law decays, not exponentials, occur at intermediate times. The results support a proposal that power law decays describe vibrational dephasing dynamics in large molecules at intermediate times because of the local nature of energy flow.

Original languageEnglish (US)
Pages (from-to)5965-5970
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume95
Issue number11
DOIs
StatePublished - May 26 1998

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