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Laser flash photolysis of new water-soluble peroxyl radical precursor

Paper ID Volume ID Publish Year Pages File Format Full-Text
27845 44046 2009 5 PDF Available
Title
Laser flash photolysis of new water-soluble peroxyl radical precursor
Abstract

Laser flash photolysis (LFP) of commercially available water-soluble 4-acetyl-4-phenylpiperidine hydrochloride (APP) in the presence of oxygen gives rise to acetylperoxyl radical (ACP). The formation of ACP during LFP of APP has been established by determining their rate constants with ABTS2− in methanolic and aqueous solutions (0.15 ± 0.02 and 2.0 ± 0.2 × 109 M−1 s−1, respectively). These rate constants are in agreement with those reported in the literature.The reactivity of ACP was investigated with crocin in aqueous and methanolic solutions. Moreover, the rate constant for the reaction of ACP with nitrite anion (NO2−) in aqueous solution was determined to be 4.45 ± 0.4 × 106 M−1 s−1.Overall, APP can be used as ACP precursor in aqueous and organic solutions using the more accessible LFP technique than the normally used (especially in aqueous solutions) pulse radiolysis technique.

Keywords
Peroxyl radicals; Laser flash photolysis; α-Cleavage; Acetylperoxyl radical; 4-Acetyl-4-phenylpiperidine hydrochloride
First Page Preview
Laser flash photolysis of new water-soluble peroxyl radical precursor
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 203, Issue 1, 5 March 2009, Pages 13–17
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering