Electrochemical Reduction Properties of Azo Dyes in Acidic Media

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (1): 62.

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Electrochemical Reduction Properties of Azo Dyes in Acidic Media

PENG Xiao-Jun¹, WANG Ji-Tao¹, YANG Jin-Zong²

1. Departent of Chemistry, Naxkai University, Tianjin, 300071;
2. School of Chemical Technology, Dalian Umivrsity of Technology

Received:1991-09-09 Revised:1992-09-19 Online:1993-01-24 Published:1993-01-24

Abstract

Abstract: The electrochemical reduction of four azo dyes in acid media were studied.All of the electro-reductions of azo groups are irreversible one-step and four-electron reductions.The ortho and para electron-withdrawing substituents(e.g.-COOBu-R) made the azo groups be reduced more easily than meta one.The azo group is prior to nitro group to be reduced in the media when a dye contains both of them.

Key words: Azo dye, Electrochemistry of azo dyes, Polarography, Reduction potential.Silver dye bleach photographic material

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PENG Xiao-Jun, WANG Ji-Tao, YANG Jin-Zong. Electrochemical Reduction Properties of Azo Dyes in Acidic Media[J]. Chem. J. Chinese Universities, 1993, 14(1): 62.

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Electrochemical Reduction Properties of Azo Dyes in Acidic Media

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