Ionic Liquid as a Precursor to Synthesize Nitrogen- and Sulfur-co-doped Carbon Dots for Detection of Copper(II) Ions

doi:10.1007/s40242-015-5118-y

Abstract

Abstract:

A facile approach was reported for the synthesis of nitrogen- and sulfur-co-doped carbon dots(N/S-CDs) by the sulfuric acid carbonization of 1-butyl-3-methylimidazolium 2-amino-3-mercaptopropionic acid(L-cysteine) salt([C₄mim][Cys]) ionic liquid. The as-prepared N/S-CDs exhibited a good solubility, excitation-dependent emission behavior, and high resistance to photobleaching. Furthermore, the N/S-CDs were employed as a fluorescent probe for detecting Cu²⁺ in real water samples with satisfactory recovery.

Key words: Carbon dot, Fluorescence, Ionic liquid, Cu²⁺, co-Doping

XU Panpan, WANG Chunfeng, SUN Dong, CHEN Yujuan, ZHUO Kelei. Ionic Liquid as a Precursor to Synthesize Nitrogen- and Sulfur-co-doped Carbon Dots for Detection of Copper(II) Ions[J]. Chemical Research in Chinese Universities, 2015, 31(5): 730-735.

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