title: Green synthesis of carbon dots with down- and up-conversion fluorescent properties for sensitive detection of hypochlorite with a dual-readout assay.
abstract: High 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.
authors: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China. zhangyy@hunnu.edu.cn.
authors: Bangda
authors: B
authors: Yin
authors: Jianhui
authors: J
authors: Deng
authors: Xue
authors: X
authors: Peng
authors: Qian
authors: Q
authors: Long
authors: Jiangna
authors: J
authors: Zhao
authors: Qiujun
authors: Q
authors: Lu
authors: Qiong
authors: Q
authors: Chen
authors: Haitao
authors: H
authors: Li
authors: Hao
authors: H
authors: Tang
authors: Youyu
authors: Y
authors: Zhang
authors: Shouzhuo
authors: S
authors: Yao
mesh_terms: D002212:Capsicum / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D055772:Green Chemistry Technology / Q000379:methods*; D006997:Hypochlorous Acid / Q000032:analysis*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D005456:Fluorescent Dyes; D006997:Hypochlorous Acid; D002244:Carbon