期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 222, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.117228
关键词
Colorimetry; Hemin; G-quadruplex; Entropy driven catalytic reaction; Water
类别
资金
- Sichuan Science and Technology Program [2018GZ0521]
- China Postdoctoral Science Foundation [2019M653475]
- Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [17kffk06]
- National Natural Science Foundation of China [31300819]
- Science and Technology Innovation Project of Chongqing Science and Technology Commission [cstc2017shms-zdyfX0063]
A sensitive and visible colorimetric strategy was proposed for Hg2+ detection by thymine-Hg2+-thymine (T-Hg2+-T) coordination chemistry and entropy driven catalytic reaction. The entropy driven catalytic reaction is induced by T-Hg2+-T coordination chemistry, resulting the releasing of G-riched sequence. Hemin/G-quadruplex-HRP-mimicking DNAzyme can be formed with the help of hemin, catalyzing TMB to TMB+ with a color change fromcolorless to blue. The sensitivity of this strategy can be reached to 2 pM, which is significantly improved by entropy driven catalytic reaction. In addition, entropy driven catalytic reaction provides a more reliable and accurate results. Thismethod shows great promise for on-site analysis and in-house diagnosis of Hg2+ in water. (C) 2019 Elsevier B.V. All rights reserved.
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