Green synthesis of carbon dots with down- and up-conversion fluorescent properties for sensitive detection of hypochlorite with a dual-readout assay
2013; Royal Society of Chemistry; Volume: 138; Issue: 21 Linguagem: Inglês
10.1039/c3an01003a
ISSN1364-5528
AutoresBangda Yin, Jianhui Deng, Xue Peng, Long Qian, Jiangna Zhao, Qiujun Lu, Qiong Chen, Haitao Li, Hao Tang, Youyu Zhang, Shouzhuo Yao,
Tópico(s)Mercury impact and mitigation studies
ResumoHigh quality carbon dots (C-dots) with down- and up-conversion fluorescence have been synthesized through low-temperature carbonization using sweet pepper as the carbon source. The C-dots with a quantum yield (QY) of 19.3% exhibit superior photophysical properties, for example, narrow and symmetric emission spectra, large stock shifts, resistance to photobleaching, and excitation-dependent fluorescence behavior. The excellent C-dots serve as useful fluorescent probes for hypochlorite (ClO−) detection by both down- and up-conversion fluorescence. Two consecutive linear ranges allow a wide determination of ClO− concentrations with a low detection limit of 0.05 μmol L−1 and 0.06 μmol L−1 (S/N = 3) for down- and up-conversion fluorescence measurements, respectively. The proposed detection method is advantageous because it is simple, sensitive, dual-signalling model and low-cost and has potential extensive applications in environmental and biological assays.
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