Selective Anion Sensing through a Self-Assembled Monolayer of Thiol-End-Functionalized Porphyrin

被引：25

作者：

Zhi, Fupeng ^{[1
]}

Lu, Xiaoquan ^{[1
]}

Yang, Jiandong ^{[1
]}

Wang, Xiaoyan ^{[1
]}

Shang, Hui ^{[1
]}

Zhang, Shaohua ^{[1
]}

Xue, Zhonghua ^{[1
]}

机构：

[1] NW Normal Univ, Coll Chem & Chem Engn, Lanzhou 730070, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 30期

关键词：

SCANNING ELECTROCHEMICAL MICROSCOPY; ELECTRON-TRANSFER RATES; DERIVATIZED PORPHYRIN; FILM FORMATION; GOLD; RECOGNITION; SURFACE; METAL; AMPLIFICATION; TRANSDUCTION;

D O I：

10.1021/jp9003278

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：

Self-assembled monolayers (SAMs) of thiol-derivatized tetraphenylporphyrin on gold are able to bind anions reversibly from aqueous solutions. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) are employed to investigate the binding of anions by porphyrin SAMs and proved to be efficient and convenient techniques for detecting anions in aqueous solutions using the redox couple Fe(CN)(6)(3-/4-) as reporter ion. SAMs of porphyrins are shown to selectively bind dihydrogenphosphate over various other anions, including Cl-, Br-, NO2-, or NO3-. Gold electrodes modified with porphyrins can detect H2PO4- even in the presence of a 10-fold excess of other anions studied.

引用

页码：13166 / 13172

页数：7

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