Wen Zhuoqi, Song Shanliang, Hu Tantan, Wang Chuanxi, Qu Fengdong, Wang Pei, Yang Minghui
Materials Science and Engineering Department, Dalian Maritime University, Dalian, 116026, People's Republic of China.
Institute of New Energy Technology, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China.
Mikrochim Acta. 2019 Mar 27;186(4):258. doi: 10.1007/s00604-019-3295-y.
A series of dual-emission fluorescent probes was prepared from copper nanoclusters (Cu NCs) and carbon dots (CDs). They show two emission peaks (blue at 469 nm and red at 622 nm) when photoexcited at 365 nm. Upon exposure to sulfide, the Cu NCs will be deteriorated because they react with sulfide to form CuS. This results in the quenching of the red fluorescence of the Cu NCs, while the blue fluorescence of the CDs remains constant. Thus, the color of the nanocomposite changes from red to blue. The ratio of the fluorescences at the two wavelengths decreases linearly in the 2-10 ppb (26-128 nM) sulfide concentration range, and the limit of detection is 0.33 ppb (4.3 nM). The nanocomposite also was placed in an agar gel and then incorporated into a paper strip for fluorometric monitoring of gaseous hydrogen sulfide. Graphical abstract Schematic presentation of the synthesis of Cu NCs (copper nanoclusters)-CDs (carbon dots) dual-emission nano-assembly, Cu NCs-CDs-agar fluorescent film and their application for the detection of sulfide and HS.
由铜纳米簇（Cu NCs）和碳点（CDs）制备了一系列双发射荧光探针。当在365 nm处光激发时，它们显示出两个发射峰（469 nm处为蓝色，622 nm处为红色）。暴露于硫化物时，Cu NCs会变质，因为它们与硫化物反应形成CuS。这导致Cu NCs的红色荧光猝灭，而CDs的蓝色荧光保持不变。因此，纳米复合材料的颜色从红色变为蓝色。在2-10 ppb（26-128 nM）硫化物浓度范围内，两个波长处荧光的比率呈线性下降，检测限为0.33 ppb（4.3 nM）。还将纳米复合材料置于琼脂凝胶中，然后掺入纸条中用于荧光监测气态硫化氢。图形摘要 Cu NCs（铜纳米簇）-CDs（碳点）双发射纳米组装体、Cu NCs-CDs-琼脂荧光膜的合成及其用于检测硫化物和HS的示意图
