Optically induced degradation of some betaine dyes

Andrey Tokmakov; Aivas Vembris; Andrejs Jurgis; Inta Muzikante; Ojars Neilands

doi:10.1117/12.515774

8 August 2003 Optically induced degradation of some betaine dyes

Andrey Tokmakov, Aivas Vembris, Andrejs Jurgis, Inta Muzikante, Ojars Neilands

Proceedings Volume 5122, Advanced Organic and Inorganic Optical Materials; (2003) https://doi.org/10.1117/12.515774
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

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.

Citation Download Citation

Andrey Tokmakov, Aivas Vembris, Andrejs Jurgis, Inta Muzikante, and Ojars Neilands "Optically induced degradation of some betaine dyes", Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); https://doi.org/10.1117/12.515774

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