Radiolysis of Confined Water: Production and Reactivity of Hydroxyl Radicals

The effect of pore size on the radiolytic production of hydroxyl radicals has been investigated in silica controlled pore glasses (CPGs) by means of the HO.‐induced conversion of coumarin into 7‐hydroxycoumarin (7‐OHC). Production of 7‐OHC decreases with decreasing pore size (see plot). This effect...

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Published inAngewandte Chemie (International ed.) Vol. 44; no. 1; pp. 110 - 112
Main Authors Foley, Sarah, Rotureau, Patricia, Pin, Serge, Baldacchino, Gérard, Renault, Jean-Philippe, Mialocq, Jean-Claude
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 17.12.2004
WILEY‐VCH Verlag
Subjects
confinement effects
fluorescence spectroscopy
mesoporous materials
radical reactions
radiolysis
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Summary:The effect of pore size on the radiolytic production of hydroxyl radicals has been investigated in silica controlled pore glasses (CPGs) by means of the HO.‐induced conversion of coumarin into 7‐hydroxycoumarin (7‐OHC). Production of 7‐OHC decreases with decreasing pore size (see plot). This effect is not attributed to the capture of HO. at the water/silica interface but to the modified diffusion regime in such confined environments.
Bibliography:The authors thank the Direction de L'Energie Nucléaire (CEA/Saclay) for financial support and Hervé Coffigny of the Direction des Sciences du Vivant (CEA/Fontenay aux Roses) for use of the gamma irradiator.
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ArticleID:ANIE200460284
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ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200460284