Abstract
Intramolecular vibrational redistribution (IVR) rates can be profoundly changed by simple chemical modifications. An example occurs in the molecular pair p-difluorobenzene (pDFB) and p-fluorotoluene (pFT). These molecules are related by the replacement of a pDFB fluorine with a methyl group to produce pFT. IVR in 300 K gas phase molecules has been characterized for regions of the S1 manifold where the ring mode density is 100–2000 states per cm−1 [1,2]. The methyl substitution increases IVR rates by about a hundred-fold [2]. The time scales change from 15–300 psec to sub-psec.
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© 1992 Springer-Verlag Berlin Heidelberg
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Zhao, ZQ., Parmenter, C.S. (1992). The Influence of a Nearly Free Methyl Rotor on the Dynamics of Vibrational Predissociation and IVR. In: Takahashi, H. (eds) Time-Resolved Vibrational Spectroscopy V. Springer Proceedings in Physics, vol 68. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84771-4_66
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DOI: https://doi.org/10.1007/978-3-642-84771-4_66
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