PHOTOLYSIS OF DIBENZYLKETONES IN SUPERCRITICAL ETHANE and CARBON DIOXIDE Article

O'Shea, KE, Combes, JR, Foxt, MA et al. (1991). PHOTOLYSIS OF DIBENZYLKETONES IN SUPERCRITICAL ETHANE and CARBON DIOXIDE . PHOTOCHEMISTRY AND PHOTOBIOLOGY, 54(4), 571-576. 10.1111/j.1751-1097.1991.tb02058.x

cited authors

  • O'Shea, KE; Combes, JR; Foxt, MA; Johnston, KP

authors

abstract

  • The Norrish Type I photofragmentation of two dibenzylic ketones (l,3‐diphenyl‐2‐pro‐panone and l‐(4‐methylphenyl)‐3‐phenyl‐2‐propanone) in supercritical ethane and carbon dioxide proceeds without evidence for cage recombination of the photogenerated radical pair. A statistical mixture of the bibenzyls formed by random coupling of benzyl and p‐xylyl radicals was observed and the first order rate constant for the depletion of the reactant was independent of pressure. These results indicate that solvent cage effects are not operative in these low viscosity supercritical fluids even in the near critical region where solute‐solvent clustering is presumably maximal. Copyright © 1991, Wiley Blackwell. All rights reserved

publication date

  • January 1, 1991

published in

Digital Object Identifier (DOI)

start page

  • 571

end page

  • 576

volume

  • 54

issue

  • 4