Structural and optical properties of solid-phase singlet oxygen photosensitizers based on fullerene aqueous suspensions
| Autor: | A. V. Ermakov, A. K. Sirotkin, I. V. Bagrov, T. K. Kris’ko, V. M. Kiselev, A. M. Starodubtsev, Inna M. Belousova, T. D. Murav'eva, V. P. Belousov, Ivan M. Kislyakov |
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| Rok vydání: | 2008 |
| Předmět: |
Aqueous solution
Materials science Fullerene Absorption spectroscopy medicine.diagnostic_test Singlet oxygen Photochemistry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Nuclear magnetic resonance chemistry law Spectrophotometry Phase (matter) medicine Spectroscopy Electron paramagnetic resonance |
| Zdroj: | Optics and Spectroscopy. 105:711-719 |
| ISSN: | 1562-6911 0030-400X |
| DOI: | 10.1134/s0030400x08110118 |
| Popis: | The relationship between the structural and photosensitizing properties of solid-phase particles of fullerene C60 in aqueous suspensions is studied using the methods of absorption spectroscopy, electron spin resonance spectroscopy (ESR), X-ray diffraction, and spectrophotometry of solutions of singlet oxygen chemical traps—histidine in combination with p-nitrosodimethylaniline. Two new variants are proposed for obtaining aqueous suspensions of particles of solid-phase fullerene whose structures are disordered and whose degrees of amorphization are 67 and 40%, respectively. It is shown that an increase in the disorder of the structure of particles in suspensions and a decrease in their average size facilitate an increase in the formation efficiency of singlet oxygen by solid-phase fullerene presumably due to an in increase in the concentration of surface localized excitons. |
| Databáze: | OpenAIRE |
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