CHEMICALLY-MODIFIED ELECTRODES BY NUCLEOPHILIC-SUBSTITUTION OF CHLOROSILYLATED PLATINUM OXIDE SURFACES

被引：14

作者：

CHEN, CH ^{[1
]}

HUTCHISON, JE ^{[1
]}

POSTLETHWAITE, TA ^{[1
]}

RICHARDSON, JN ^{[1
]}

MURRAY, RW ^{[1
]}

机构：

[1] UNIV N CAROLINA,KENAN LABS CHEM,CHAPEL HILL,NC 27599

来源：

LANGMUIR | 1994年 / 10卷 / 09期

关键词：

D O I：

10.1021/la00021a069

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Chlorosilylated platinum oxide electrode surfaces can be generated by reaction of SiCl4 vapor with an electrochemically prepared monolayer of platinum oxide. A variety of nucleophilic agents (such as alcohols, amines, thiols, and Grignard reagents) can be used to displace chloride and thereby functionalize the metal surface. Electroactive surfaces prepared with ferrocene methanol as the nucleophile show that derivatization by small molecules can achieve coverages on the order of a full monolayer. Surfaces modified with long-chain alkyl groups efficiently block electrode reactions of redox probes dissolved in the contacting solution, but other electrochemical (double layer capacitance and surface coverage) and contact angle measurements suggest that these molecule films are not highly ordered, self-assembled monolayers.

引用

页码：3332 / 3337

页数：6

共 41 条

[31] SPONTANEOUSLY ORGANIZED MOLECULAR ASSEMBLIES .4. STRUCTURAL CHARACTERIZATION OF NORMAL-ALKYL THIOL MONOLAYERS ON GOLD BY OPTICAL ELLIPSOMETRY, INFRARED-SPECTROSCOPY, AND ELECTROCHEMISTRY [J].