Radiolysis of Confined Water: Production and Reactivity of Hydroxyl Radicals

Abstract

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. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2005/z460284_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.