Singlet Oxygen Generation Processes in Solutions of Fullerenes in Carbon Tetrachloride

Singlet molecular oxygen generation is studied by means of its NIR luminescence at light excitation by pulse, pulse-periodic and CW sources in C 60 and C 70 solutions in CCl 4 . Singlet oxygen concentration is determined in the stationary and pulse modes of irradiation. The quenching rate constants...

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Bibliographic Details
Published in:Fullerenes, nanotubes, and carbon nanostructures nanotubes, and carbon nanostructures, 2008-09, Vol.16 (5-6), p.675-681
Main Authors: Bagrov, I. V., Belousova, I. M., Danilov, O. B., Ermakov, A. V., Grenishin, A. S., Kiselev, V. M., Kislyakov, I. M., Murav'eva, T. D., Sosnov, E. N., Videnichev, D. A.
Format: Article
Language:English
Subjects:
Astralen
Fullerene
Luminescence
Singlet oxygen
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Summary:Singlet molecular oxygen generation is studied by means of its NIR luminescence at light excitation by pulse, pulse-periodic and CW sources in C 60 and C 70 solutions in CCl 4 . Singlet oxygen concentration is determined in the stationary and pulse modes of irradiation. The quenching rate constants of 1 Δ g state of O 2 molecule by fullerene are found to be (7.2 ± 0.1)·10 7  M −1 s −1 (C 70 ) and < 6·10 4  M −1 s −1 (C 60 ). Temperature and photolytic changes in the solutions photosensibilization ability are studied using optical and ESR spectroscopy methods. A pulse liquid singlet oxygen generator is constructed and studied on the base of the C 60 solution in CCl 4 . Production of singlet oxygen into gas phase is realized with the concentration 5·10 16  cm −3 .
ISSN:1536-383X
1536-4046
DOI:10.1080/15363830802316983