Table of Contents
Laser Chemistry
Volume 16, Issue 4, Pages 219-228

A New Persistent Photon-Gated Spectral Hole-Burning System: Zinc Tetraphenylporphyrin Linked to Polyvinylbenzylchloride-Co-Polystyrene

1Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (URA 1906 du CNRS) Ecole Normale Supérieure de Cachan 61, Avenue du Président Wilson, Cachan Cedex 94235, France
2Faculté des Sciences, Université Mohammed 1er, Oujda, Morocco
3Institute of Spectroscopy, Russian Academy of Sciences, Troitzk, Moscow region 142092, Russia

Received 5 July 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.


Two colour photon-gated persistent spectral hole-burning via donor-acceptor electron transfer is reported in systems where the donor: zinc tetraphenylporphyrin (ZnTPP) and the acceptor: vinylbenzylchloride where linked to a polystyrene chain. A spectral hole is observed when the sample is irradiated using a gating light in addition to the wavelength-selective light. No effect of the gating light has been observed for ZnTPP dispersed in polystyrene (PS) even with efficient acceptors. In contrast, the efficiency of hole formation under two colour excitation is four times larger than that under one colour excitation in ZnTPP-PBCS/PMMA and nearly two times larger in ZnTPP-PBCS/PS.