N-1-(2-Mercaptoethyl)thymine modification of gold nanoparticles: a highly selective and sensitive colorimetric chemosensor for Hg2+

被引：77

作者：

Chen, Ling ^{[1
,3
]}

Lou, Tingting ^{[1
,3
]}

Yu, Chunwei ^{[1
,3
]}

Kang, Qi ^{[2
]}

Chen, Lingxin ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Coastal Zone Environm Proc, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China

[2] Shandong Normal Univ, Key Lab Mol & Nanomat Probes, Minist Educ China, Coll Chem Chem Engn & Mat Sci, Jinan 250014, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ANALYST | 2011年 / 136卷 / 22期

基金：

中国国家自然科学基金;

关键词：

CATALYTIC BEACONS; MERCURY(II) IONS; BASE-PAIRS; DNA; THYMINE; SENSOR; REMEDIATION; PROBE; AG+;

D O I：

10.1039/c1an15585g

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An approach for mercury ions (Hg2+) sensing based on the Hg2+-induced aggregation of thymine (T)-SH-functionalized gold nanoparticles (AuNPs) has been reported. The T-SH ligands that we synthesized can easily be coupled to the surface of AuNPs through the Au-S bond and can recognize Hg2+ with high selectivity by forming a T-Hg-T complex with strong affinity. For the T-SH-functionalized AuNPs (T-S-AuNPs) sensor, upon addition of Hg2+, the formation of the T-Hg-T complex induces aggregation of T-S-AuNPs and results in a significant change of color and UV-Vis absorption spectra. Thus, our method can be used for the rapid, easy and reliable screening of Hg2+ in aqueous solution, with high sensitivity (2.8 nM) and selectivity over competing analytes. The developed method is successfully applied to the sensing of Hg2+ in real environmental samples.

引用

页码：4770 / 4773

页数：4

共 31 条

[1] Hydrogen-Bonding Recognition-Induced Color Change of Gold Nanoparticles for Visual Detection of Melamine in Raw Milk and Infant Formula [J].