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Inhibition of Photogalvanic Phenomena by K. Weber; E. Matijević is a Chemistry article available to read on EtoBox.

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## Abstract Solutions of thionine give in presence either of thiosine‐amine or diethyl‐thiosine‐amine pronounced photogalvanic effects, the numerical values of which amount to over 400 mV. Under the influence of light, the redox‐potential of the system becomes more negative. These effects are closely related to the photochemical bleaching of thionine. In regard to the rate of increase, as well as to the influence of light, the photogalvanic effect may be interpreted by means of the general kinetic equation of photochemical kinetics. The photogalvanic effects of thionine are strongly inhibited by various inorganic salts and polyphenols. Reducing agents stabilise these systems in such a way that the initial redox‐potential of the electrode becomes negative, while for oxidizing agents the stabilization potential takes much more positive values. Apart from inhibition, the addition of foreign substances brings about electrolytic as well as other effects which increase numerical values of photogalvanic effects. Other thiazinic and azinic dyes show also photogalvanic effects. It is probable that there is a close connection between their normal redox‐potentials and the magnitude of photoga

Who reads Inhibition of Photogalvanic Phenomena?

Author

K. Weber; E. Matijević

Publisher

Elsevier Science; Wiley (John Wiley & Sons); Royal Netherlands Chemical Society; Wiley (ISSN 0165-0513)

Published

2010

Language

SN

Field

Chemistry (Physical Sciences)