Investigation of self-assembled monolayers of two short-chain molecules by the electrochemical titration method

Yan Song Zhu; Dong Yan Hou; Hui Bo Shao

Investigation of self-assembled monolayers of two short-chain molecules by the electrochemical titration method

Yan Song Zhu^*
, Dong Yan Hou
, Hui Bo Shao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Two short-chain molecules of cysteamine and 4-aminothiophenol were modified on gold electrode by self-assembled monolayers (SAMs), when they were studied by cyclic voltammetry, it was found that peak current increased and the peak separation decreased. The reason was that the coverage of two modified electrodes was not compacted and [Fe(CN)₆]^3-/4- was affected by end group -NH² of cysteamine and 4-ami-on-thiophenol. The electrochemical behavior of two modified electrodes was studied in [Fe(CN) ₆]_3-/4- solution at different pH. The surface pK _b of the self-assembled monolayers of cysteamine and 4-aminothiophenol was estimated to be 2. 4 ±0.2 and 4.7±0.2 respectively by the electrochemical titration method. The coverage of two modified electrodes was compared by cyclic voltammograms in alkaline solution.

Original language	English
Pages (from-to)	201-205
Number of pages	5
Journal	Chinese Journal of Analytical Chemistry
Volume	35
Issue number	2
Publication status	Published - Feb 2007
Externally published	Yes

Keywords

4-aminothiophenol
Cysteamine
Electrochemical titration
Self-assembled monolayer

Cite this

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title = "Investigation of self-assembled monolayers of two short-chain molecules by the electrochemical titration method",

abstract = "Two short-chain molecules of cysteamine and 4-aminothiophenol were modified on gold electrode by self-assembled monolayers (SAMs), when they were studied by cyclic voltammetry, it was found that peak current increased and the peak separation decreased. The reason was that the coverage of two modified electrodes was not compacted and [Fe(CN)6]3-/4- was affected by end group -NH2 of cysteamine and 4-ami-on-thiophenol. The electrochemical behavior of two modified electrodes was studied in [Fe(CN) 6]3-/4- solution at different pH. The surface pK b of the self-assembled monolayers of cysteamine and 4-aminothiophenol was estimated to be 2. 4 ±0.2 and 4.7±0.2 respectively by the electrochemical titration method. The coverage of two modified electrodes was compared by cyclic voltammograms in alkaline solution.",

keywords = "4-aminothiophenol, Cysteamine, Electrochemical titration, Self-assembled monolayer",

author = "Zhu, \{Yan Song\} and Hou, \{Dong Yan\} and Shao, \{Hui Bo\}",

year = "2007",

month = feb,

language = "English",

volume = "35",

pages = "201--205",

journal = "Chinese Journal of Analytical Chemistry",

issn = "0253-3820",

publisher = "Chinese Academy of Sciences",

number = "2",

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TY - JOUR

T1 - Investigation of self-assembled monolayers of two short-chain molecules by the electrochemical titration method

AU - Zhu, Yan Song

AU - Hou, Dong Yan

AU - Shao, Hui Bo

PY - 2007/2

Y1 - 2007/2

N2 - Two short-chain molecules of cysteamine and 4-aminothiophenol were modified on gold electrode by self-assembled monolayers (SAMs), when they were studied by cyclic voltammetry, it was found that peak current increased and the peak separation decreased. The reason was that the coverage of two modified electrodes was not compacted and [Fe(CN)6]3-/4- was affected by end group -NH2 of cysteamine and 4-ami-on-thiophenol. The electrochemical behavior of two modified electrodes was studied in [Fe(CN) 6]3-/4- solution at different pH. The surface pK b of the self-assembled monolayers of cysteamine and 4-aminothiophenol was estimated to be 2. 4 ±0.2 and 4.7±0.2 respectively by the electrochemical titration method. The coverage of two modified electrodes was compared by cyclic voltammograms in alkaline solution.

AB - Two short-chain molecules of cysteamine and 4-aminothiophenol were modified on gold electrode by self-assembled monolayers (SAMs), when they were studied by cyclic voltammetry, it was found that peak current increased and the peak separation decreased. The reason was that the coverage of two modified electrodes was not compacted and [Fe(CN)6]3-/4- was affected by end group -NH2 of cysteamine and 4-ami-on-thiophenol. The electrochemical behavior of two modified electrodes was studied in [Fe(CN) 6]3-/4- solution at different pH. The surface pK b of the self-assembled monolayers of cysteamine and 4-aminothiophenol was estimated to be 2. 4 ±0.2 and 4.7±0.2 respectively by the electrochemical titration method. The coverage of two modified electrodes was compared by cyclic voltammograms in alkaline solution.

KW - 4-aminothiophenol

KW - Cysteamine

KW - Electrochemical titration

KW - Self-assembled monolayer

UR - https://www.scopus.com/pages/publications/58849118351

M3 - Article

AN - SCOPUS:58849118351

SN - 0253-3820

VL - 35

SP - 201

EP - 205

JO - Chinese Journal of Analytical Chemistry

JF - Chinese Journal of Analytical Chemistry

IS - 2

ER -

Investigation of self-assembled monolayers of two short-chain molecules by the electrochemical titration method

Abstract

Keywords

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