Detection of trace Hg2+ via induced circular dichroism of DNA wrapped around single-walled carbon nanotubes

被引：97

作者：

Gao, Xueyun ^{[1
]}

Xing, Gengmei ^{[1
]}

Yang, Yanlian ^{[2
]}

Shi, Xiaoli ^{[3
]}

Liu, Ru ^{[1
]}

Chu, Weiguo ^{[2
]}

Jing, Long ^{[1
]}

Zhao, Feng ^{[1
]}

Ye, Chang ^{[1
]}

Yuan, Hui ^{[1
]}

Fang, Xiaohong ^{[3
]}

Wang, Chen ^{[2
]}

Zhao, Yuliang ^{[1
,2
]}

机构：

[1] Inst High Energy Phys, Lab Bioenvironm Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China

[2] Natl Ctr Nanosci & Technol, Beijing 100080, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Mol Nanostruct & Nanotechnol, Beijing 100080, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 29期

关键词：

D O I：

10.1021/ja801793k

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

The strongly induced circular dichroism (ICD) signals of DNA wrapped around single-walled carbon nanotubes I are shown by the Synchrotron Radiation Facility. In solution, trace amounts of Hg ions have a strong affinity to bind the nucleic bases of DNA-SWCNTs via a pseudo-first-order kinetic reaction. The Hg binding to the bases of DNA results in partial DNA disassociation from the SWCNTs. Such disassociation of DNA from the SWCNTs will decrease the coupling effects of the transition dipole moments between DNA and SWCNTs, thus inducing the ICD signal of DNA-SWCNTs to decrease significantly. Herein, the ICD of DNA-SWCNTs is applied to detect the concentration of Hg ions at.

引用

页码：9190 / +

页数：3

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