## Abstract The theory demonstrating the role of medium at the fluorescence quenching of polar compounds in solutions is briefly presented. It has been shown, that the rate of S~1~ β X~__n__~ nonradiative conversion between the intramolecular charge transfer states depends on the permanent dipole m
Solvent polarity and viscosity effect on the fluorescence spectrum and excited state lifetime of quinine dication
β Scribed by Sanjay Pant; H.B. Tripathi; D.D. Pant
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 408 KB
- Volume
- 85
- Category
- Article
- ISSN
- 1010-6030
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π SIMILAR VOLUMES
The room-temperature lifetimes of ring-substituted excited diphenylmethyl radicals have been shown to correlate well with the energy gap between the fluorescent lowest excited doublet and the ground state. Attempts to correlate the lifetimes with Hammett constants were unsuccessful.
The electronic absorption, and fluorescence excitation and emission spectra of 11 quinaxolines have been measured at room temperature (298 K) in several solvents of different polarities (cyclohexane, dioxane, ethylether, chloroform, ethylacetate, 1-butanol, 2-propanol, ethanol, methanol, acetonitril