Journal of Physical Chemistry p. 5482 - 5485 (1993)
Update date:2022-08-24
Topics:
Peters, Kevin S.
Freilich, Steven C.
Lee, Joseph
Picosecond absorption spectroscopy is used to examine the dynamics of the 2+2 photodimerization reaction of trans-stilbene in benzene.The quenching of the first excited singlet state of trans-stilbene by ground-state trans-stilbene occurs at the diffusion limit, 2.03 * 1010 M-1 s-1.Upon quenching, a new intermediate is formed with a λmax of 480 nm which is characteristic of the charge-transfer species.The rate of the decay of the transient species is (2.40 +/- 0.37) * 109 s-1.The assignment of the transient to the excimer or a biradicaloid species at the pericyclic minimum is discussed.
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