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Trends in Photochemistry & Photobiology   Volumes    Volume 5 
Time resolved photoconductivity: monitoring ion formation to improve the knowledge of photoinitiating systems
C. Ley, J. P. Fouassier, P. Jacques, R. Gaume, X. Allonas
Pages: 93 - 102
Number of pages: 10
Trends in Photochemistry & Photobiology
Volume 5 

Copyright © 1999 Research Trends. All rights reserved

The present paper describes the time resolved photoconductivity applied in fluid media to the study of ion photogeneration. In the first part, it is shown that this technique is a powerful alternative to the transient absorption spectroscopy for the determination of ion yield. By using external reference it is possible to determine accurate ion yields (error < 5%). The second part is a typical application on a three component system ketone/amine/bromocompound which is an efficient photoinitiating system. The bromocompound acts as a scavenger towards ketyl radical. This reaction leads to the recovery of the initial ketone and the generation of a new initiating species.
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