NDLI: Photobleaching mechanisms of Radachlorin photosensitizer in aqueous solution

Content Provider	Springer Nature Link
Author	Beltukova, D. M. Vasyutinskii, O. S. Glazov, A. L. Semeva, I. V. Smolin, A. G.
Copyright Year	2017
Abstract	The time dependence of the fluorescence intensity of aqueous solutions of Radachlorin photosensitizer at different concentrations and the influence of the dissolved oxygen concentration on the fluorescence dynamics are analyzed. The experimental results are interpreted based on the numerical solution of the system of kinetic equations describing the photochemical processes that lead to the formation and degradation of singlet oxygen in solution. The influence of possible mechanisms of photosensitizer photobleaching is analyzed. It is shown that the main photobleaching mechanism under our experimental conditions is the chemical reaction between the photosensitizer in the triplet state and dissolved oxygen molecules. Two rate constants of electron-transfer chemical reactions, which are important for understanding the nature of the occurring photoprocesses, are determined.
Starting Page	229
Ending Page	234
Page Count	6
File Format	PDF
ISSN	0030400X
Journal	Optics and Spectroscopy
Volume Number	122
Issue Number	2
e-ISSN	15626911
Language	English
Publisher	Pleiades Publishing
Publisher Date	2017-03-07
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optics, Lasers, Photonics, Optical Devices
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials

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Photobleaching mechanisms of Radachlorin photosensitizer in aqueous solution