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Proceedings Paper

Optically induced degradation of some betaine dyes
Author(s): Andrey Tokmakov; Aivas Vembris; Andrejs Jurgis; Inta Muzikante; Ojars Neilands
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Paper Abstract

The studies of two betaine molecules for optically induced intramolecular electron transfer important in photosynthesis and photoelectricity are presented. The investigated betaine molecules possess a large permanent dipole moment changing the sign and value at excitation within the intramolecular charge transfer band (380 - 410 nm). The molecules are mixed with poly(methylmetacrylate) polymer and solvent to cast thin films. The optical density of the intramolecular charge transition band and the change of surface potential of the prepared films are found to decrease at irradiation of the same wavelength. The decrease of optical density is avoided by protecting the polymer film from ambient oxygen. Photo-oxidation of betaine molecules is discussed.

Paper Details

Date Published: 8 August 2003
PDF: 6 pages
Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); doi: 10.1117/12.515774
Show Author Affiliations
Andrey Tokmakov, Institute of Physical Energetics (Latvia)
Aivas Vembris, Institute of Physical Energetics (Latvia)
Andrejs Jurgis, Institute of Physical Energetics (Latvia)
Inta Muzikante, Institute of Physical Energetics (Latvia)
Ojars Neilands, Riga Technical Univ. (Latvia)

Published in SPIE Proceedings Vol. 5122:
Advanced Organic and Inorganic Optical Materials
Andris Krumins; Donats Millers; Inta Muzikante; Andris Sternbergs; Vismants Zauls, Editor(s)

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