Table of Contents
Laser Chemistry
Volume 19 (1999), Issue 1-4, Pages 325-327

Time-Resolved Resonance Raman Study of Biphenyl Occluded in the Supercages of Faujasitic Zeolites

Laboratoire de Spectrochimie Infrarouge et Raman UPR-CNRS 2631, Centre d' Etudes et de Recherehes Lasers et applications, Université de Lille I, Bât. C5, Villeneuve d' Ascq Cedex 59655, France

Received 21 April 1997

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.


The laser photolysis (248 nm, 20 ns) of biphenyl (BP, S0) occluded in the void space of faujasitic zeolites (NanFAU) , Nan(SiO2)192n(AlO2)n with n=0, 56, 85 has been studied by time-resolved resonance Raman spectroscopy combined with time-resolved diffuse reflectance UV-visible absorption spectroscopy in the ns–μs time scale. The excitation (370 nm, 8 ns) of the RR scattering in the wavelength region of the UV electronic absorption of the transient species provides clear evidence of the radical cation (BP+) as major species for zeolites NanFAU (n=56, 85). The amount of triplet state (BP, T1) depends on the aluminum content and in a less extent on the fluence of the pump laser at the sample.