Syage, J. A. and Lambert, Wm. R. and Felker, P. M. and Zewail, A. H. and Hochstrasser, R. M. (1982) Picosecond excitation and TRANS-CIS isomerization of stilbene in a supersonic jet: Dynamics and spectra. Chemical Physics Letters, 88 (3). pp. 266-270. ISSN 0009-2614. http://resolver.caltech.edu/CaltechAUTHORS:20160923-081446039
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Abstract
New details of the dynamics and spectroscopy of trans-stilbene are revealed by picosecond excitation of jet-cooled and collisin-free molecules. The fluorescence spectra clearly show the low-frequency torsional modes of the ground state. The time-resolved fluorescence following S_1 excitation exhibit exponential decay times ranging from 2.7 ns to ≈190 ps for excitation wavelengths varying from 3102 Å (0 excess energy) to 2850 Å (2851 cm^(−1) excess energy). The results indicate that an energy threshold for isomerization occurs at ≈1200 cm^(−1). The redistribution of vibrational energy from the optically excited modes to the ethylene bond torsional modes leading to isomerization is discussed.
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| Additional Information: | © 1982 Elsevier B.V. Received 5 March 1982. This material is based upon work supported by the National Science Foundation under Grant No. CHE-8112833 and CHE-7908710. Alfred P. Sloan Foundation Fellow and Camille & Henry Dreyfus Foundation Teacher-Scholar. | ||||||||||
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| Record Number: | CaltechAUTHORS:20160923-081446039 | ||||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20160923-081446039 | ||||||||||
| Official Citation: | J.A. Syage, Wm.R. Lambert, P.M. Felker, A.H. Zewail, R.M. Hochstrasser, Picosecond excitation and TRANS-CIS isomerization of stilbene in a supersonic jet: Dynamics and spectra, Chemical Physics Letters, Volume 88, Issue 3, 7 May 1982, Pages 266-270, ISSN 0009-2614, http://dx.doi.org/10.1016/0009-2614(82)87085-1. (http://www.sciencedirect.com/science/article/pii/0009261482870851) | ||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
| ID Code: | 70550 | ||||||||||
| Collection: | CaltechAUTHORS | ||||||||||
| Deposited By: | Ruth Sustaita | ||||||||||
| Deposited On: | 29 Sep 2016 20:47 | ||||||||||
| Last Modified: | 29 Sep 2016 20:47 |
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