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Effects of Surfactants on the Photosensitized Production of Tyrosine Radicals Studied by Photo‐CIDNP ¶
Author(s) -
Lopez J. J.,
Carter M. A. G.,
Tsentalovich Yu. P.,
Morozova O. B.,
Yurkovskaya A. V.,
Hore P. J.
Publication year - 2002
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 - 10.1562/0031-8655(2002)0750006eosotp2.0.co2
Subject(s) - cidnp , chemistry , photochemistry , flash photolysis , radical , ammonium bromide , eosin y , pulmonary surfactant , photocatalysis , organic chemistry , catalysis , kinetics , biochemistry , physics , quantum mechanics , reaction rate constant
The influence of the surfactants sodium dodecyl sulphate, cetyltrimethyl‐ammonium bromide and triton X‐100 on the photochemically induced dynamic nuclear polarization (CIDNP) of N ‐acetyl tyrosine has been investigated. Three photosensitizers were used to generate polarization: thionin, eosin Y and flavin mononucleotide. 600 MHz 1 H photo‐CIDNP experiments, supported by laser flash photolysis transient absorption measurements, indicate that the neutral triton surfactant has no influence on the nuclear polarization, but that the other two, charged, amphiphiles affect the photochemistry in a variety of ways, depending on the surfactant concentration and the identity of the sensitizer.