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PHOTOIONIZATION OF CRYSTAL VIOLET IN AQUEOUS SOLUTION
Author(s) -
Bhasikuttan A. C.,
Sapre A. V.,
Rao K. V. S. Rama,
Mittal J. P.
Publication year - 1995
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.1751-1097.1995.tb05265.x
Subject(s) - photoionization , crystal violet , excited state , photochemistry , aqueous solution , chemistry , flash photolysis , ionization , crystal (programming language) , solvated electron , photodissociation , analytical chemistry (journal) , atomic physics , ion , reaction rate constant , kinetics , physics , radiolysis , organic chemistry , computer science , programming language , medicine , pathology , quantum mechanics
— Laser flash photolysis studies were carried out on a triphenylmethane dye, crystal violet (CV + ), at 248 nm in aqueous solutions. The results show that CV + undergoes photoionization and the resulting transients CV ‐2+ , hydrated electrons (e ‐ aq ) and CV + radical formed by the reaction of e ‐ aq with CV + have been characterized. Studies using suitable scavengers were done to support the characterization of the transient species. Laser intensity effects show that the ionization is biphotonic. Two mechanisms are proposed to explain the observed photoionization involving higher excited singlet state and/ or another long‐lived excited state of the dye.