Laser flash photolysis study on the quenching reaction of the excited triplet state of acenaphthenequinone by antioxidant vitamin C

Laser flash photolysis study on the quenching reaction of the excited triplet state of... The photo-induced reactions of acenaphthenequinone (ACQ) as well as ACQ and vitamin C (VC) in ACN–H2O (v/v, 4:1) mixed solvent have been investigated by means of laser flash photolysis technique. The reaction intermediates have been identified and the reaction mechanism has been analyzed. The self-quenching rate constant of 3ACQ* by ground state ACQ and the quenching rate constant of 3ACQ* by biological antioxidant VC have also been measured. The results indicate that there is a hydrogen transfer from VC to 3ACQ* during the laser photolysis. VC is an effective quencher to 3ACQ* and the quenching rate constant is 4.0 × 108 L mol−1 s−1. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Laser flash photolysis study on the quenching reaction of the excited triplet state of acenaphthenequinone by antioxidant vitamin C

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Publisher
Springer Netherlands
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1443-2
Publisher site
See Article on Publisher Site

Abstract

The photo-induced reactions of acenaphthenequinone (ACQ) as well as ACQ and vitamin C (VC) in ACN–H2O (v/v, 4:1) mixed solvent have been investigated by means of laser flash photolysis technique. The reaction intermediates have been identified and the reaction mechanism has been analyzed. The self-quenching rate constant of 3ACQ* by ground state ACQ and the quenching rate constant of 3ACQ* by biological antioxidant VC have also been measured. The results indicate that there is a hydrogen transfer from VC to 3ACQ* during the laser photolysis. VC is an effective quencher to 3ACQ* and the quenching rate constant is 4.0 × 108 L mol−1 s−1.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Oct 29, 2013

References

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