M. Swaminathan, S. Dogra
1983
Citations
0
Influential Citations
15
Citations
Journal
Journal of Photochemistry
Abstract
Abstract The effects of solvents and pH on the absorption and fluorescence spectra of 3,5-diphenylpyrazole were studied. The changes in the absorption spectra observed in polar solvents were explained on the basis of steric effects caused by solvent interaction. The absorption and fluorescence spectra in cyclohexane indicated a change in the nuclear conformation of the molecule upon excitation. The p K a * values for both the equilibria, i.e. the cation neutral anion forms, calculated using the Forster cycle method are analysed.