Direct modification of a gold electrode with aminophenyl groups by electrochemical reduction of in situ generated aminophenyl monodiazonium cations

被引：244

作者：

Lyskawa, Joel ^{[1
]}

Belanger, Daniel ^{[1
]}

机构：

[1] Univ Quebec, Dept Chim, Montreal, PQ H3C 3P8, Canada

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 20期

关键词：

D O I：

10.1021/cm060752d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aminophenyl groups were electrochemically grafted at the surface of a gold electrode by reduction of in situ generated aminophenyl monodiazonium cations. The in situ aminophenyl monodiazonium cations were generated by reaction of 1 equiv of p-phenylenediamine with 1 equiv of sodium nitrite in 0.5 M HCl, and their formation was confirmed by gas chromatography-mass spectrometry. The presence of aminophenyl groups at the surface of the gold electrode was demonstrated by electrochemistry and infrared and X-ray photoelectron spectroscopies. The formation of an inhomogeneous multilayered film was also evidenced by atomic force microscopy. Furthermore, grafted aminophenyl groups present at the gold electrode surface reacted with trifluoroacetic acid anhydride in dry tetrahydrofuran with a reaction yield of about 75% for the trifluoroacetylation of the amine groups.

引用

页码：4755 / 4763

页数：9

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