Table of Contents
Laser Chemistry
Volume 16 (1996), Issue 3, Pages 197-206

Femtosecond Transient Absorption Microspectroscopy of Benzil Confined Into a Single Bead of Porous Glass

1School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, USA
2Light and Material Group, PRESTO, JRDC; Department of Chemistry, Kwansei Gakuin University, Uegahara, Nishinomiya 662, Japan
3Department of Applied Physics, Osaka University, Osaka 565, Japan
4ERATO, Research Development Corporation of Japan, 15 Morimoto-cho, Shimogamo, Sakyo-ku, Kyoto 606, Japan

Received 27 September 1995

Copyright © 1996 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.


The photophysical properties of benzil dissolved in free solution and in solution confined into a single bead of porous glasses (size < 100 μm) were investigated by femtosecond transient absorption microspectroscopy. In nonpolar solvent, cyclohexane, the rate of conformational change from the skewed to the near trans-planar form was reduced from 2.2 × 1012s-1 in free solution to 9.1 × 1011s-1 in porous glasses with an average pore diameter of 26 nm. In polar solvent, DMF, however, there was little difference between the two systems.