fl uorescent carbon dots probe for mercury ( II ) based on thymine – mercury ( II ) – thymine structure †

Content Provider	Semantic Scholar
Author	Li, Yuanyuan Zhang, Zhong Hou Yang, Hao-Fan Shao, Guang Gan, Feng
Copyright Year	2018
Abstract	A novel thymine-functional fluorescent sensor was developed for Hg detection with high sensitivity and selectivity. The synthesis of the fluorescent sensor took two steps (1) the synthesis of amine-functionalized carbon dots (CDs-PEI); and (2) the attaching of thymine moieties on to the surface of the CDs-PEI through EDC/NHS coupling chemistry to obtain the thymine-functional fluorescence carbon dots (CDs-Thy). The CDs-Thy were successfully applied to detect Hg by quenching fluorescence with a rapid response through photoinduced electron transfer with the formation of T–Hg–T structures. The linear concentration range of Hg is 0–1.0 mmol L 1 and a limit of detection (LOD) as low as 3.5 10 8 mol L 1 was obtained. Moreover, the CDs-Thy can resist interference from other metal ions and anions. The CDs-Thy were also used for the Hg detection in water samples and the recoveries were from 90% to 104%. Due to the simplicity and effectiveness, it shows great promise as a potential sensing platform for Hg.
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Alternate Webpage(s)	https://pubs.rsc.org/en/content/articlepdf/2018/ra/c7ra11487g
Language	English
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Content Type	Text
Resource Type	Article