Primary Processes in the Photochemistry of Eosin

The proposed mechanism of collisional quenching of eosin fluoroscence in which the quencher molecule transfers electrons to the excited dye, thus reducing the dye through the semiquinone intermediary was supported by flash photolysis of eosin-phenol systems. Aqueous mixtures of eosin Y and Phenol we...

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Bibliographic Details
Published in:The Journal of chemical physics 1959-01, Vol.31 (4), p.1141-1142
Main Authors: Grossweiner, L. I., Zwicker, E. F.
Format: Article
Language:English
Subjects:
AMMONIUM COMPOUNDS
ATOMS
CHEMISTRY
CITRIC ACID
COLLISIONS
DECOMPOSITION
DYES
ELECTRIC FIELDS
ELECTRON TRANSFER
ELECTRONS
EOSIN
EXCITATION
FLUORESCENCE
HEAT TREATMENTS
IRRADIATION
PHENOLS
PHOTOCHEMISTRY
REACTION KINETICS
SOLUTIONS
SPECTRA
WATER
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Summary:The proposed mechanism of collisional quenching of eosin fluoroscence in which the quencher molecule transfers electrons to the excited dye, thus reducing the dye through the semiquinone intermediary was supported by flash photolysis of eosin-phenol systems. Aqueous mixtures of eosin Y and Phenol were flash irradiated through a layer of ammonium citrate which limited the light absorption to the eosin visible band. The occurrence of the spectrum in the eosin- photosensitized reaction is evidence of the electron transfer. (J.R.D.)
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1730532