Solvent effects on photophysical parameters for coumarin laser dyes
Abstract
The red shifts of absorption and emission bands of coumarin laser dyes were studied as a function of solvent polarity and hydrogen bonding. Spectra were correlated with solvent parameters, pi and alpha, and those solvents resulting in the largest Stokes shifts of dye emission were identified. Solvent effects on emission yield and lifetime revealed a major non-radiative decay path for dyes in which the 7 amine function is free to adopt a non-planar conformation.
- Publication:
-
Technical Report
- Pub Date:
- January 1980
- Bibcode:
- 1980bu...reptR....J
- Keywords:
-
- Absorption Spectra;
- Dye Lasers;
- Emission Spectra;
- Photochemical Reactions;
- Solvents;
- Hydrogen Bonds;
- Polarization Characteristics;
- Red Shift;
- Stokes Law Of Radiation;
- Lasers and Masers