THE EFFICIENCY OF SINGLET OXYGEN GENERATION BY ALLOXAZINE AND LUMICHROME

M. Sikorski ^a, E. Sikorska ^b, D.R. Worrall ^c and F. Wilkinson ^c

^a Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznan, Poland ^b Faculty of Commodity Science, Poznan University of Economics, 60-967 Poznan, Poland ^c Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, England

Abstract

The efficiencies of the photosensitised production of singlet oxygen by alloxazine and lumichrome have been determined in acetonitrile. For these compounds the measurements have demonstrated that the efficiency of singlet oxygen production from the triplet state is high. In addition, the lifetimes of the singlet and triplet states and some spectral properties of the compounds in acetonitrile are also reported.