
TY  - JOUR
A1  - Leaver, IH 
T1  - An E.S.R. study of radical intermediates in the photoreduction of xanthene dyes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1971
VL  - 24
IS  - 4
SP  - 753
EP  - 763
KW  - 
UR  - https://doi.org/10.1071/CH9710753 
N2  - E.s.r. spectra are reported for the semireduced radicals of fluorescein, eosin Y, and rose bengal B, formed during the photolysis of these dyes in alcohol solutions of various indole derivatives and triethylamine. When indoleacetic acid is used as substrate, the dye radicals exist as the diprotonated monoanion radicals, with OH proton splitting constants varying from 0.12 G (fluorescein) to 1.0 G (rose bengal B). In the presence of tryptamine or triethylamine the intermediate dye radicals exist as the unprotonated radical trianions. The e.s.r. spectrum of the semireduced monoanion radical of rhodamine B was also observed during photolysis of the dye in the presence of triethylamine. 
ER  -

