文献类型：期刊文献

英文题名：Tea-derived carbon dots with two ratiometric fluorescence channels for the independent detection of Hg2+ and H2O

作者：Ding, Chuanlu[1];Xing, Hao[1];Guo, Xuhong[1,2];Yuan, Huihui[3];Li, Cuihua[1];Zhang, Xiulan[1];Jia, Xin[1]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, State Key Lab Incubat Base Green Proc Chem Engn, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：16

起止页码：1998

外文期刊名：ANALYTICAL METHODS

收录：;EI(收录号：20231613900306);WOS:【SCI-EXPANDED(收录号:WOS:000968896500001)】；

基金：This work was supported by High-level Talent Start-up Fund of Shihezi University. We appreciate the Analysis and Testing Center Shihezi University for us to identify samples.

语种：英文

外文关键词：Carbon - Doping (additives) - Mercury compounds - Optical properties

摘要：Ratiometric fluorescence carbon dots (CDs) that serve as probes have attracted more attention on account of their unique optical properties, low toxicity, anti-interference, and internal reference. However, the facile fabrication of CDs with the aim of detecting multiple targets through mutually independent response channels is always a challenge. Herein, multifunctional label-free N-doped ratiometric fluorescence CDs (N-CDs) are developed from tea leaves extract and o-phenylenediamine by a mild solvothermal method. The prepared N-CDs are tailored with nitrogen- and oxygen-containing functional groups on the surface and contribute to splendid hydrophilia. Two completely independent ratiometric fluorescence channels of N-CDs, respectively, respond to Hg2+ and H2O in a mutually independent manner. Based on the interactions of N-Hg and O-Hg, N-CDs achieve an excellently sensitive and selective detection for Hg2+ in the channel of I-387 nm/I-351 nm, giving a linear relationship in the range of 0-50 mu M. Also, a wide range of Hg2+ concentration (0-100 mu M) is linear to A(374 nm) through UV-vis assay. Otherwise, the linear determination of H2O content (0-30%) is realized in another channel (I-green/I-blue). The good performance in the independent testing of Hg2+ and H2O, demonstrate that the proposed N-CDs have potential in multifunctional detection.