Excited-state phenomena associated with solvation site heterogeneity: a large edge-excitation red-shift in a merocyanine dye-ethanol solution
| Autor: | Khader A. Al-Hassan, M. Ashraf El-Bayoumi |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Quantitative Biology::Biomolecules
Chemistry Relaxation (NMR) Solvation General Physics and Astronomy Photochemistry Fluorescence Spectral line Condensed Matter::Soft Condensed Matter Solvent Chemical physics Excited state Polar Physics::Chemical Physics Physical and Theoretical Chemistry Excitation |
| Zdroj: | Chemical Physics Letters. 76:121-124 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/0009-2614(80)80618-x |
| Popis: | The electronic spectra of a merocyanine dye in a polar solvent have been studied at different temperatures. Absence of excitation wavelength dependence at room temprature in a fluid medium is due to orientational and translational relaxation of the “solvent-cage”. For the rigid solution, lifetimes of various “solute-solvent conformations” are larger than the excited-state lifetime; hence excitation-wavelength dependent fluorescence occurs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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