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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2026-93-03-102-110

УДК: 535.373.2

Sensitized photochromism of bacteriorhodopsin films

Lantukh, Y.D.
For Russian citation (Opticheskii Zhurnal):

Лантух Ю.Д. Сенсибилизированный фотохромизм пленок бактериородопсина // Оптический журнал. 2026. Т. 93. № 3. С. 102–110. http://doi.org/10.17586/1023-5086-2026-93-03-102-110

Lantukh Yu.D. Sensitized photochromism of bacteriorhodopsin films [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 3. P. 102–110. http://doi.org/10.17586/1023-5086-2026-93-03-102-110

For citation (Journal of Optical Technology):
-
Abstract:

Subject of Study. Photochromic properties of bacteriorhodopsin in a solid matrix with the addition of acridine orange, a sensitizing dye. Aim of study. Demonstration of the possibility of sensitized control of photochromism of the film form of bacteriorhodopsin by means of non-radiative energy transfer from organic dye molecules and, as an example, a model of an elementary fully optically controlled transparency. Method. A film donor-acceptor system was obtained by immobilizing acridine orange dye (donor) from an aqueous solution onto a “Biochrom” film based on bacteriorhodopsin (acceptor). The dynamics of bacteriorhodopsin’s visible transmission spectrum changes upon laser excitation of the donor were spectrophotometrically studied. Main Results. It was shown that upon excitation of the donor, a reversible disappearance of the protein absorption band in the visible region (500–600 nm) was observed. This effect can be attributed to controlled photochromism of bacteriorhodopsin due to excitation energy transfer. A prototype cell with modulated optical transmission has been realized. Practical significance. The results of this study allow us to extend the spectral sensitivity of bacteriorhodopsin beyond the absorption band of the protein’s primary form. This expands the potential for bacteriorhodopsin’s application as a photochromic material, as well as its use in photovoltaics, sensors, and other fields.

Keywords:

Bacteriorhodopsin, energy transfer, organic dyes, associates, optically controlled transparency

OCIS codes: 300.6390, 160.1435, 250.2080

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