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TWO NEW METHODS OF ACTINOMETRY FOR EPR‐MEASUREMENTS
Author(s) -
Moan J.,
Høvik B.,
Wold E.
Publication year - 1979
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1979.tb07189.x
Subject(s) - actinometer , chemistry , electron paramagnetic resonance , radical , photochemistry , singlet oxygen , hematoporphyrin , nitroxyl , steric effects , ion , oxygen , organic chemistry , nuclear magnetic resonance , plasma , photodynamic therapy , quantum mechanics , physics
— Two methods to perform actinometry in an EPR‐cavity are described. One method is based on the observation that photoproduced anion radicals of hematoporphyrin react with the stable free radical 2,2,6,6‐tetramethyl‐4‐piperidone‐N‐oxyl to eliminate the spin. The other method is based on the dye sensitized photoproduction of nitroxyl radicals resulting from the reaction of singlet oxygen with sterically hindered amines.