The light-dependent oxygen reduction by monolayers of hydrated chlorophyll a oligomer

A. G. Volkov; M. I. Gugeshashvili; G. Munger; R. M. Leblanc

doi:10.1016/0302-4598(93)85005-E

The light-dependent oxygen reduction by monolayers of hydrated chlorophyll a oligomer

A. G. Volkov, M. I. Gugeshashvili, G. Munger, R. M. Leblanc

Chemistry

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8 Scopus citations

Abstract

The phenomenon of light-dependent O₂ uptake by monolayers of hydrated chlorophyll a oligomer deposited by the Langmuir-Blodgett technique on an SnO₂ optically transparent electrode has been observed. Spectra of cathodic photocurrents coincided with the absorption spectrum of hydrated oligomer of chlorophyll a. In the presence of an artificial electron donor, hydroquinone, and an oxygen electron acceptor, both the cathodic and the anodic photocurrent caused by dry and wet chlorophyll a molecules of monolayer were measured under illumination in the range 400-800 nm. The effects of electrode potentials and redox reagents on the magnitude of solar energy conversion by the chlorophyll a monolayer at the optically transparent electrode are discussed. ESR and circular dichroism spectra show that hydrated oligomer of chlorophyll a consists of six molecules of chlorophyll a bonded with water molecules.

Original language	English (US)
Pages (from-to)	305-314
Number of pages	10
Journal	Bioelectrochemistry and Bioenergetics
Volume	29
Issue number	3
DOIs	https://doi.org/10.1016/0302-4598(93)85005-E
State	Published - Feb 1993

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ASJC Scopus subject areas

Biophysics
Physical and Theoretical Chemistry
Electrochemistry

Cite this

Volkov, A. G., Gugeshashvili, M. I., Munger, G., & Leblanc, R. M. (1993). The light-dependent oxygen reduction by monolayers of hydrated chlorophyll a oligomer. Bioelectrochemistry and Bioenergetics, 29(3), 305-314. https://doi.org/10.1016/0302-4598(93)85005-E

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abstract = "The phenomenon of light-dependent O2 uptake by monolayers of hydrated chlorophyll a oligomer deposited by the Langmuir-Blodgett technique on an SnO2 optically transparent electrode has been observed. Spectra of cathodic photocurrents coincided with the absorption spectrum of hydrated oligomer of chlorophyll a. In the presence of an artificial electron donor, hydroquinone, and an oxygen electron acceptor, both the cathodic and the anodic photocurrent caused by dry and wet chlorophyll a molecules of monolayer were measured under illumination in the range 400-800 nm. The effects of electrode potentials and redox reagents on the magnitude of solar energy conversion by the chlorophyll a monolayer at the optically transparent electrode are discussed. ESR and circular dichroism spectra show that hydrated oligomer of chlorophyll a consists of six molecules of chlorophyll a bonded with water molecules.",

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AB - The phenomenon of light-dependent O2 uptake by monolayers of hydrated chlorophyll a oligomer deposited by the Langmuir-Blodgett technique on an SnO2 optically transparent electrode has been observed. Spectra of cathodic photocurrents coincided with the absorption spectrum of hydrated oligomer of chlorophyll a. In the presence of an artificial electron donor, hydroquinone, and an oxygen electron acceptor, both the cathodic and the anodic photocurrent caused by dry and wet chlorophyll a molecules of monolayer were measured under illumination in the range 400-800 nm. The effects of electrode potentials and redox reagents on the magnitude of solar energy conversion by the chlorophyll a monolayer at the optically transparent electrode are discussed. ESR and circular dichroism spectra show that hydrated oligomer of chlorophyll a consists of six molecules of chlorophyll a bonded with water molecules.

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10.1016/0302-4598(93)85005-E