Fluorescence and amplified spontaneous emission of glass forming compounds containing styryl-4H-pyran-4-ylidene fragment
| Autor: | Arunas Miasojedovas, Vidmantas Gulbinas, Renata Karpicz, Inta Muzikante, Aivars Vembris, Saulius Jursenas, Gytis Sliauzys |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Amplified spontaneous emission Barbituric acid Chemistry Biophysics General Chemistry Electron acceptor Condensed Matter Physics Photochemistry Biochemistry Fluorescence Atomic and Molecular Physics and Optics chemistry.chemical_compound Pyran Molecule Lasing threshold Order of magnitude |
| Zdroj: | Journal of Luminescence. 132:2421-2426 |
| ISSN: | 0022-2313 |
| Popis: | Potential of glassy films of newly synthesised low molecular weight organic molecules for light amplification and lasing applications has been investigated by analysing fluorescence, transient differential absorption and amplified spontaneous emission properties. These non-symmetric and symmetric molecules contain styryl-4H-pyran-4-ylidene fragment with three different electron acceptor groups: dicyanomethylene, barbituric acid, indene-1,3-dione. Fluorescence quantum yields of the investigated compounds in solutions are between 0.32 and 0.54, while they drop down by an order of magnitude in thin solid films. Incorporation of bulky side groups reduced excitonic interactions enabling manifestation of amplified spontaneous emission in the neat films of the investigated derivatives. |
| Databáze: | OpenAIRE |
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