Design and investigation of a Ru(II) N-heterocyclic complex which undergoes proton coupled electron transfer

被引：19

作者：

Ayers, T ^{[1
]}

Caylor, N ^{[1
]}

Ayers, G ^{[1
]}

Godwin, C ^{[1
]}

Hathcock, DJ ^{[1
]}

Stuman, V ^{[1
]}

Slattery, SJ ^{[1
]}

机构：

[1] State Univ W Georgia, Dept Chem, Carrollton, GA 30118 USA

来源：

INORGANICA CHIMICA ACTA | 2002年 / 328卷 / 01期

基金：

美国国家科学基金会;

关键词：

N-heterocyclic complexes; proton coupled electron transfer; cyclic voltammetry; Ru(II) compounds;

D O I：

10.1016/S0020-1693(01)00667-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel tridentating ligand containing a single ionizable proton was designed for studying proton coupled electron transfer. The ligand was synthesized by derivatizing 2,2'-bipyridine at the 6-position with benzimidazole (bpy-bzimH), and it was used to prepare the compound [Ru(bpy-bzimH(2)](PF6)(2). Cyclic voltammetry was used to characterize the redox behavior in an aprotic (0.1 M TBAH-CH2Cl2) and protic (1:1 acetonitrile-water buffered solutions) solvent conditions where the latter was employed to characterize the pH-dependence of the Ru(III/II) couple. The redox potential as a function of pH was plotted and reveals a one-proton/one-electron transfer in two separate pH regions (1.39-2.58, and 5.92-7.97), while a two-proton/one-electron process was exhibited between 2.58 and 5.92. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：33 / 38

页数：6

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