In situ spectroelectrochemistry of 2,5-diphenyl-1,3,4-oxadiazole

被引：17

作者：

Kress, L ^{[1
]}

Neudeck, A ^{[1
]}

Petr, A ^{[1
]}

Dunsch, L ^{[1
]}

机构：

[1] IFW DRESDEN EV,INST FESTKORPERFORSCH,ABT ELEKTROCHEM & LEITFAHIGE POLYMERE,D-01069 DRESDEN,GERMANY

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1996年 / 414卷 / 01期

关键词：

2,5-diphenyl-1,3,4-oxadiazole; reduction mechanism; cyclic voltammetry; spectroelectrochemistry;

D O I：

10.1016/0022-0728(96)04645-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical reduction of 2,5-diphenyl-1,3,4-oxadiazole has been studied by both cyclic voltammetry and spectroelectrochemistry. The in situ spectroscopic techniques were applied to obtain structural information on the products of the follow-up reactions. Time-resolved UV-vis spectroscopy, with spectra measured on a time scale of 20 ms by a diode array spectrometer, was used in cyclic voltammetry to obtain up to 60 single spectra in the forward and backward scans. The radical anion of 2,5-diphenyl-1,3,4-oxadiazole, which is formed in the electron transfer reaction at the electrode, was studied by ESR spectroscopy. Furthermore, paramagnetic products of the follow-up reactions were detected. A reaction mechanism is formulated that includes an irreversible protonation reaction and, in parallel, a reversible ion-pairing reaction with the supporting electrolyte cation for the electrochemically generated radical anion and an irreversible follow-up reaction for the dianion of 2,5-diphenyl-1,3,4-oxadiazole.

引用

页码：31 / 40

页数：10

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