Luminescence of Radachlorin Photosensitizer in Aqueous Solution under Excitation at 405 and 660 nm
| Autor: | I. M. Gadzhiev, Oleg S. Vasyutinskii, S. E. Goncharov, V. P. Belik, Irina V. Semenova, D. M. Beltukova |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
030103 biophysics Materials science Singlet oxygen Quantum yield 02 engineering and technology 021001 nanoscience & nanotechnology Photochemistry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 03 medical and health sciences chemistry.chemical_compound chemistry Excited state Photosensitizer Triplet state 0210 nano-technology Phosphorescence Luminescence Excitation |
| Zdroj: | Optics and Spectroscopy. 124:49-52 |
| ISSN: | 1562-6911 0030-400X |
| DOI: | 10.1134/s0030400x18010034 |
| Popis: | Entire luminescence spectrum of a commercial photosensitizer Radachlorin in aqueous solution has been recorded under laser excitation at 660 nm and analyzed. The peak of singlet oxygen phosphorescence at 1274 nm has been observed. The results obtained were compared with those recorded with laser excitation at 405 nm and reported earlier. The comparison showed the similarity of relaxation and luminescence processes occurring in both cases. Effective absorption cross sections were determined at each excitation wavelength, it was also shown that the singlet oxygen quantum yield is independent of photosensitizer concentration. The lifetime of the first excited triplet state in Radachlorin was determined. The results obtained can be used for optimization of the conditions of singlet oxygen generation and detection in solutions and biological samples. |
| Databáze: | OpenAIRE |
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