Fluorescence, Decay Time, and Structural Change of Laser Dye Cresyl Violet in Solution due to Microwave Irradiation at GSM 900/1800 Mobile Phone Frequencies
| Autor: | Korkut Yegin, Fuat Bayrakceken |
|---|---|
| Přispěvatelé: | Bayrakceken, F., Yegin, K., Yeditepe Üniversitesi |
| Rok vydání: | 2012 |
| Předmět: |
Dye laser
Article Subject Renewable Energy Sustainability and the Environment lcsh:TJ807-830 lcsh:Renewable energy sources Analytical chemistry Quantum yield General Chemistry Electronic structure Photochemistry Fluorescence Atomic and Molecular Physics and Optics Cresyl violet chemistry.chemical_compound chemistry Absorption band Molecular vibration General Materials Science Irradiation |
| Zdroj: | International Journal of Photoenergy, Vol 2012 (2012) |
| ISSN: | 1687-529X 1110-662X |
| Popis: | Microwave irradiation at GSM 900/1800 MHz mobile phone frequencies affects the electronic structure of cresyl violet in solution. These changes are important because laser-dye cresyl violet strongly bonds to DNA- and RNA-rich cell compounds in nerve tissues. The irradiation effects on the electronic structure of cresyl violet and its fluorescence data were all obtained experimentally at room temperature. For most laser dyes, this is not a trivial task because laser dye molecules possess a relatively complex structure. They usually consist of an extended system of conjugated double or aromatic ?-bonds with attached auxochromic (electron donating) groups shifting the absorption band further towards longer wavelength. Because of the intrinsically high degree of conjugation, the vibrational modes of the molecular units couple strongly with each other. We found that the fluorescence quantum yield was increased from 0.54 ± 0.03 to 0.75 ± 0.01 due to intramolecular energy hopping of cresyl violet in solution which is exposed to microwave irradiation at mobile phone frequencies, and the photonic product cannot be used as a laser dye anymore. © 2012 Fuat Bayrakceken and Korkut Yegin. |
| Databáze: | OpenAIRE |
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