In Situ Microscopic FTIR Spectroelectrochemistry Study of Oxidation of L-Ascorbic Acid in Polymer Electrolyte(PEG/LiClO4)

Chem. J. Chinese Universities ›› 1998, Vol. 19 ›› Issue (5): 802.

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In Situ Microscopic FTIR Spectroelectrochemistry Study of Oxidation of L-Ascorbic Acid in Polymer Electrolyte(PEG/LiClO₄)

GUO Li-Ping¹, LIN Xiang-Qin²

1. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022;
2. Department of Chemistry, University of Science of Technology of China, Hefei, 230026

Received:1997-01-15 Online:1998-05-24 Published:1998-05-24

Abstract

Abstract: In situ microscopic FTIRspectroelectrochemistry behavior of L-ascorbic acid (H₂A) in polymer electrolyte is reported for the first time. H₂A undergoes a two-step oxidation. The oxidation waves shift towards more anodic potential values when the scan rate increases. The peak currents of the oxidation waves are proportional to the square roots of scan rate up to 100 mV/s. The in situ infrared spectra suggest that the product of the oxidation be dehydroascorbic acid, which may exist as a dimer.

Key words: Polymer electrolyte, Ascorbic acid, In situ microscopic FTIR, Dehydroascorbic acid

CLC Number:

O646

TrendMD:

GUO Li-Ping, LIN Xiang-Qin . In Situ Microscopic FTIR Spectroelectrochemistry Study of Oxidation of L-Ascorbic Acid in Polymer Electrolyte(PEG/LiClO₄)[J]. Chem. J. Chinese Universities, 1998, 19(5): 802.

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In Situ Microscopic FTIR Spectroelectrochemistry Study of Oxidation of L-Ascorbic Acid in Polymer Electrolyte(PEG/LiClO₄)

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