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PHOTOIONIZATION OF TRYPTOPHAN: AN ELECTRON SPIN RESONANCE INVESTIGATION
Author(s) -
Hoebeke M.,
Gandin E.,
Lion Y.
Publication year - 1986
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.1751-1097.1986.tb04705.x
Subject(s) - photoionization , electron , electron paramagnetic resonance , chemistry , scavenger , atomic physics , free radical scavenger , spectroscopy , resonance (particle physics) , spin (aerodynamics) , irradiation , radical , photochemistry , ionization , nuclear magnetic resonance , physics , ion , antioxidant , nuclear physics , biochemistry , organic chemistry , quantum mechanics , thermodynamics
The photoionization of tryptophan has been studied by ESR spectroscopy using the free radical scavenger 5, 5 dimethyl‐1‐pyrroline‐l‐oxide as a spin trap for hydrated electrons. A special set‐up has been devised to irradiate more than one aliquot of the bubbled aqueous solutions in the cavity without removing the ESR cell out of the cavity. Quantum yields of electrons production have been estimated as a function of irradiation wavelength. No photoionization threshold has been observed in these experiments.