Direct Electro-oxidation of Toluene Derivations on Graphite Electrode

doi:10.7503/cjcu20121107

Abstract

Abstract:

Direct electro-oxidation behaviors of toluene derivations(p-methoxy methylbenzene, p-xylene, p-chloro methylbenzene, p-tert-butyl methylbenzene) were studied by cyclic voltammetry(CV), in situ Fourier transform infrared spectroscopy(in situ FTIR), and constant potential electrolysis on graphite electrode in sulfuric acid and acetone solutions. The direct electro-oxidation behaviors of the four toluene derivations were similar. The negative-going band at 1710 cm^-1 is the stretching vibration peak of carboxyl group of aromatic aldehydes, and the positive-going band at 1130 cm^-1 shows the consumption peak of methyl of toluene derivations. The main electro-oxidation products are aromatic aldehydes detected by gas chromatography-mass spectrometry(GC-MS). The yield of p-methoxy benzaldehyde could reach up to 70.9% in the sulfuric acid system at 40 ℃.

Key words: Toluene derivation, in situ Fourier transform infrared spectroscopy, Graphite electrode, Aromatic aldehyde

CLC Number:

O646

TrendMD:

ZHU Ying-Hong, LU Zai-Xiang, CHEN Qiong, MA Chun-An. Direct Electro-oxidation of Toluene Derivations on Graphite Electrode[J]. Chem. J. Chinese Universities, 2013, 34(9): 2210.

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Direct Electro-oxidation of Toluene Derivations on Graphite Electrode

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