William J. Leigh, R. Srinivasan
JACS
The fluorescence emission from alcoholic solutions of 7-monoalkylamino-4-methyl coumarins shifts from blue to blue-green on the addition of acid. Fluorescence and excitation spectra measured at various concentrations show that with increasing concentration, a new excitation peak appears which is the source of the blue-green emission in the presence of acid. It is suggested that this new species is a dimer of the coumarin. The analyses of the amplified fluorescence spectra with a streak camera indicate that the blue-green emission is due to a transient excited species, consistent with a model based on the addition of H+ to the excited dimeric state. © 1974.
William J. Leigh, R. Srinivasan
JACS
R. Srinivasan, Bodil Braren, et al.
Journal of Applied Physics
Barbara J. Garrison, R. Srinivasan
Journal of Applied Physics
Jose A. Ors, R. Srinivasan
Journal of Organic Chemistry