Self-assembled monolayers of long-chain xanthic acids on gold studied by voltammetry

被引：14

作者：

Gothelf, KV ^{[1
]}

机构：

[1] Aarhus Univ, Ctr Met Catalyzed React, Dept Chem, DK-8000 Aarhus C, Denmark

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2000年 / 494卷 / 02期

关键词：

xanthic acids; dithiocarbonates; gold electrodes; self-assembly; cyclic voltammetry;

D O I：

10.1016/S0022-0728(00)00377-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new method for the formation of xanthic acids H(CH2)(n)CS2H (n = 8, 10, 12) in a non-polar solvent from the corresponding potassium salts was developed. It was found that the xanthic acids spontaneously adsorb onto gold electrodes, via a mechanism that is proposed to be similar to the adsorption of thiols on gold surfaces. The xanthate modified gold electrodes were studied by cyclic voltammetry. It was found that the xanthate layers efficiently block the current from a ferro/ferri redox couple in aqueous solution. Studies of the electrochemical desorption of the xanthate layer supported the fact that xanthic acids spontaneously form a self-assembled monolayer on the electrode. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：147 / 150

页数：4

共 15 条

[1] FORMATION OF MONOLAYERS BY THE COADSORPTION OF THIOLS ON GOLD - VARIATION IN THE HEAD GROUP, TAIL GROUP, AND SOLVENT [J].

BAIN, CD ;

EVALL, J ;

WHITESIDES, GM .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (18) :7155-7164

[2] DETERMINATION OF XANTHOGENATES BY TITRATION WITH PERCHLORIC ACID [J].

BERGER, J .

ACTA CHEMICA SCANDINAVICA, 1952, 6 (9-10) :1564-1567

[3] Electrochemical stability of self-assembled monolayers on gold [J].

Beulen, MWJ ;

Kastenberg, MI ;

van Veggel, FCJM ;

Reinhoudt, DN .

LANGMUIR, 1998, 14 (26) :7463-7467

[4]

BOEGEMANN M, 1955, METHOD ORGAN CHEM, V9, P810

[5]

Finklea HO, 1996, ELECTROANAL CHEM, V19, P109

[6] INFRARED AND PHOTOELECTRON SPECTROSCOPIC STUDIES OF ETHYL AND OCTYL XANTHATE IONS ADSORBED ON METALLIC AND SULFIDIZED GOLD SURFACES [J].

IHS, A ;

UVDAL, K ;

LIEDBERG, B .

LANGMUIR, 1993, 9 (03) :733-739

[7] OPTICAL AND ELECTROCHEMICAL-BEHAVIOR OF THE ADSORPTION OF POTASSIUM ETHYL XANTHATE ON GOLD [J].

LEZNA, RO ;

DETACCONI, NR ;

ARVIA, AJ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 255 (1-2) :251-266

[8] SIMULATED DATA FOR ELECTROCHEMICAL DETERMINATION OF RATE CONSTANTS FOR HOMOGENEOUS ELECTRON-TRANSFER REACTIONS WITH A 2ND-ORDER HOMOGENEOUS FOLLOW-UP REACTION .1. COUPLING BETWEEN MEDIATOR AND REDUCED FORM OF THE SUBSTRATE [J].

PEDERSEN, SU ;

SVENSMARK, B .

ACTA CHEMICA SCANDINAVICA SERIES A-PHYSICAL AND INORGANIC CHEMISTRY, 1986, 40 (09) :607-614

[9] A combined in situ infrared spectroscopy and scanning tunnelling microscopy study of ethyl xanthate adsorption on Au(111) [J].

Talonen, P ;

Sundholm, G ;

Floate, S ;

Nichols, RJ .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (15) :3661-3666

[10] Formation and structure of self-assembled monolayers [J].

Ulman, A .

CHEMICAL REVIEWS, 1996, 96 (04) :1533-1554

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