Laser Chemistry

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Laser Chemistry / 1999 / Article

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Proceedings of the Eighth Conference on Time-Resolved Vibrational Spectroscopy

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Volume 19 |Article ID 80507 | 4 pages | https://doi.org/10.1155/1999/80507

Femtosecond Transient Absorption Studies of Simple Polyenes in Solution

Kaoru Ohta,1,2 Yukito Naitoh,2 Keisuke Tominaga,2 Noboru Hirota,1 and Keitaro Yoshihara2

1Department of Chemistry, Kyoto University, Japan

2Institute for Molecular Science, Myodaiji, Japan

Received08 Apr 1997

Abstract

We have conducted femtosecond transient absorption experiments on the excited-state dynamics of trans- and cis-hexatriene (HT) in solution. The transient absorption in the visible region decays with the time constant of about 500 fs, indicating that the internal conversion (IC) to the ground state occurs quite efficiently. The bleach recovery signal contains several time constants. The vibrational relaxation in the ground state occurs in 10–20ps and the slow relaxation process, which may be due to the conformational change around C—C single bond, proceeds in a subnanosecond time scale.

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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