Electron transfer at Au surfaces modified by tethered osmium bipyridine-pyridine complexes
Electron transfer at Au surfaces modified by tethered osmium bipyridine-pyridine complexes
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DOI：
10.1007/s10008-007-0339-8
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发表时间：
2007-11-01
影响因子：
2.5
通讯作者：
Fainstein, Alex
中科院分区：
文献类型：
--
作者：
Ricci, Alejandra;Rolli, Claudio;Fainstein, Alex
通过（1）半胱胺与醛（X=CHO）的反应，（2）巯基链烷酸与胺[X=（CH 2）（2）NH 2]的反应，（3）对氨基苯甲酸的重氮盐的还原和与锇络合物的胺衍生物[X=（CH 2）]的进一步酰胺化反应，2NH2]来探索这些氧化还原改性表面的电子转移性质。用红外反射吸收光谱和共振拉曼光谱对修饰后的Au表面进行了表征。循环伏安法被用来研究的锇配合物的电化学性质共价连接到表面作为一个函数的类型和长度的系链。
Chemically modified electrodes by the osmium complex [Os(bpy)(2)ClPy - X]+PF6- tethered to Au surfaces by (1) reaction of cysteamine with the aldehyde (X=CHO), (2) mercapto alkanoic acid reaction with amine [X=(CH2)(2)NH2], and (3) reduction of the diazonium salt of p-aminobenzoic acid and further amidation reaction with the amine derivative of the osmium complex [X=(CH2)2NH2] were performed to explore the electron transfer properties of these redox-modified surfaces. The modified Au surfaces were characterized by infrared reflection absorption spectroscopy and resonant Raman spectroscopy. Cyclic voltammetry was used to study the electrochemical properties of the osmium complexes covalently attached to the surface as a function of the type and length of the tether.