Primary photophysical processes in phenylcyclohexane
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 68, 1323-1330
- https://doi.org/10.1039/f29726801323
Abstract
The fluorescence spectra and measured lifetimes of the first excited singlet state of phenylcyclohexane have been determined as a function of concentration and temperatue. The binding energy of the phenylcyclohexane excimer is found to be 0.27 (± 0.03) eV. Triplet yield measurements on 0.12 M solutions in cyclohexane as a function of temperature have been made between 30 and 60°C. The activation energy and pre-exponential factor for the radiationless S1→S0 decay are 0.26 (± 0.03) eV and 4.7 (± 0.5)× 1011 s–1. The intersystem crossing process is slightly temperature dependent in the range studied. The results are compared with those for benzene, determined previously, and their significance discussed qualitatively on a symmetry basis.Keywords
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