Intramolecular vibrational dephasing obeys a power law at intermediate times.
basic_science · Level V
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- Record sourced from PubMed, PMID 9600900.
- Also identified by PMC identifier 27568.
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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.