SOLVENT EFFECT ON THE REDOX POTENTIAL OF QUINONE-SEMIQUINONE SYSTEMS

被引：58

作者：

JAWORSKI, JS

LESNIEWSKA, E

KALINOWSKI, MK

机构：

[1] Department of Chemistry, University of Warsaw, 02-093 Warsaw

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1979年 / 105卷 / 02期

关键词：

D O I：

10.1016/S0022-0728(79)80126-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Polarographic reduction of 1,4-benzoquinone, 1,4-naphthoquinone, 9,10-phenanthrenequinone and 9,10-anthraquinone was studied in pyridine, acetone, hexamethylphosphoramide, dimethylformamide, dimethylacetamide, acetonitrile, dimethylsulfoxide and propylene carbonate. The variation of the E1/2-values proper for the first electron transfer step (measured against oxidation potential of ferrocene) with the properties of solvent is analyzed in terms of the donor-acceptor concept. Linear correlations of E1/2 vs. acceptor number are observed; the slopes of corresponding lines correlate with the spin densities at oxygen atoms of semiquinones. © 1979 Elsevier Sequoia S.A.

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页码：329 / 334

页数：6

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