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Ionization Processes in Polar Solution of Tryptophan at 77° K
Author(s) -
Moan J.
Publication year - 1971
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197100089
Subject(s) - chemistry , ionization , electron , polar , absorption (acoustics) , ion , ethylene glycol , photochemistry , solvent , atomic physics , wavelength , visible spectrum , tryptophan , molecular physics , optoelectronics , optics , organic chemistry , physics , quantum mechanics , astronomy , biochemistry , amino acid
The triplet absorption spectrum of tryptophan in ethylene‐glycol/water glass at 77°K has been registered. It is demonstrated that light of wavelength 250 nm produces trapped electrons by a two‐photon process in this system. In both UV‐ and X‐ray‐induced ionization the probability that an ejected electron will recombine with its mother ion is around 0.5. Bleaching with visible light causes the trapped electrons to react with the solvent and there is also a considerable degree of retrapping. The retrapping becomes more probable when the temperature increases.