Laser photolysis studies of β-bond cleavage of phenacyl phenyl sulfide in acetonitrile

Laser photolysis studies of β-bond cleavage of phenacyl phenyl sulfide in acetonitrile Photo-induced β-bond dissociation of phenacyl phenyl sulfide (PPS) has been investigated in acetonitrile by laser photolysis techniques. Direct excitation of PPS at 295 K provided the acetylmethyl and phenylthiyl radicals with a quantum yield (Φrad) of 0.18, whereas triplet sensitization using xanthone revealed an efficiency for β-cleavage of triplet PPS (α rad) of ≥0.64. From disagreement between the Φrad and α rad values, it was concluded that both the lowest excited single and triplet states are reactive for β-bond dissociation in PPS. The photochemical processes of excited PPS, including β-cleavage, are discussed in detail. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Laser photolysis studies of β-bond cleavage of phenacyl phenyl sulfide in acetonitrile

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Publisher
Brill Academic Publishers
Copyright
Copyright © 2006 by VSP
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856706778606480
Publisher site
See Article on Publisher Site

Abstract

Photo-induced β-bond dissociation of phenacyl phenyl sulfide (PPS) has been investigated in acetonitrile by laser photolysis techniques. Direct excitation of PPS at 295 K provided the acetylmethyl and phenylthiyl radicals with a quantum yield (Φrad) of 0.18, whereas triplet sensitization using xanthone revealed an efficiency for β-cleavage of triplet PPS (α rad) of ≥0.64. From disagreement between the Φrad and α rad values, it was concluded that both the lowest excited single and triplet states are reactive for β-bond dissociation in PPS. The photochemical processes of excited PPS, including β-cleavage, are discussed in detail.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 1, 2006

References

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