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Cis-trans Photoisomerization of 1,3,5,7-Octatetraene in n-Hexane at 4.2 K

Mark F. Granville, Gary R. Holtom and Bryan E. Kohler
Proceedings of the National Academy of Sciences of the United States of America
Vol. 77, No. 1, [Part 1: Physical Sciences] (Jan., 1980), pp. 31-33
Stable URL: http://www.jstor.org/stable/8285
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Cis-trans Photoisomerization of 1,3,5,7-Octatetraene in n-Hexane at 4.2 K
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Abstract

Photoisomerization of the linear polyene 1,3,5,7-octatetraene has been observed in an n-hexane matrix maintained at the boiling point of helium. To a good approximation, only the trans,trans and cis,trans isomers participate in the photochemistry. These compounds have been unambiguously identified by comparing the observed high-resolution fluorescence spectra to those of chromatographically purified reference compounds. Although the quantum yield of this process is probably low, its microscopic rate seems to compete favorably with vibrational deactivation.

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