Electrochemical Scanning Tunneling Spectroscopy of Redox-Active Molecules Bound by Au-C Bonds
Electrochemical Scanning Tunneling Spectroscopy of Redox-Active Molecules Bound by Au-C Bonds
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DOI：
10.1021/ja907867b
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发表时间：
2010-03-03
影响因子：
15
通讯作者：
Nichols, Richard J.
中科院分区：
文献类型：
--
作者：
Ricci, Alejandra M.;Calvo, Ernesto J.;Nichols, Richard J.
比较了在扫描隧道显微镜纳米间隙中与 Au(111) 连接的氧化还原 [Os(联吡啶)(吡啶)Cl]络合物与两种不同金属-分子结的分子传导电化学门控。相同的氧化还原分子结构通过巯基苯甲酸或对氨基苯甲酸的芳基重氮盐的还原而束缚，分别产生Au-S或Au-C键。在每种情况下，氧化还原分子振动弛豫的两步电子转移机制都是显而易见的。
A comparison of the electrochemical gating of molecular conduction by a redox [Os(bipyridine)(pyridine)Cl] complex tethered to Au(111) with two different metal-molecule junctions in a scanning tunneling microscope nanogap is presented. The same redox molecular structure was tethered by mercaptobenzoic acid or reduction of the aryldiazonium salt of p-aminobenzoic acid, resulting in a Au-S or Au-C bond, respectively. A two-step electron-transfer mechanism with vibrational relaxation of the redox molecule is apparent in each case.