Photochemistry of macromolecular dyes in aqueous solutions

Natarajan, P. (1988) Photochemistry of macromolecular dyes in aqueous solutions Journal of Macromolecular Science: Part A - Chemistry, 25 (10-11). pp. 1285-1306. ISSN 1060-1325

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Thiazine and phenazine dyes are known to exhibit photoredox behavior in the excited states of these molecules. These dyes are covalently attached to macromolecules, and the photochemistry has been investigated in homogeneous solution and as thin films coated onto electrodes. Flash photolysis of the macromolecular thionine in the presence of quenchers shows reduction of the dye and the subsequent disproportionation of the reduced dye. In the case of macromolecular thionine, evidence for the formation of a complex between ferrous ion and thionine is observed in the flash photolysis experiments. Photoelectrochemical studies show a new type of behavior for the macromolecular dye films coated onto electrodes. Macromolecular thionine film coated onto platinum electrode makes the electrode a cathode on illumination of the electrode. Macromolecular phenosafranine dye films coated onto electrodes change the polarity of the illuminated electrode depending upon the nature of the macromolecule.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Group.
ID Code:77794
Deposited On:14 Jan 2012 12:44
Last Modified:14 Jan 2012 12:44

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