Silicon-hybrid carbon dots strongly enhance the chemiluminescence of luminol

被引:37
作者
Lin, Zhen [1 ,2 ]
Dou, Xiangnan [2 ]
Li, Haifang [2 ]
Chen, Qiushui [2 ]
Lin, Jin-Ming [2 ]
机构
[1] Fujian Med Univ, Dept Pharmaceut Anal, Fac Pharm, Fuzhou 350004, Peoples R China
[2] Tsinghua Univ, Beijing Key Lab Micronalyt Methods & Instrumentat, Dept Chem, Key Lab Bioorgan Phosphorus Chem & Chem Biol, Beijing 100084, Peoples R China
关键词
Carbon dots; Chemiluminescence; Luminol; Bromosuccinimide; SINGLET OXYGEN; QUANTUM DOTS; NANODOTS; WATER; AZIDE; OXIDE;
D O I
10.1007/s00604-013-1153-x
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
We report on a 4-min microwave pyrolytic method for the preparation of fluorescent and water-soluble silicon-hybrid carbon dots (C-dots) with high fluorescent quantum yield. The material is prepared by preheating aminopropyltriethoxysilane and ethylene diamine tetraacetic acid for 1 min, then adding a mixture of poly(ethylene glycol) and glycerin to the solution and heating for another 3 min. It is found that the hybrid carbon dots strongly enhance the chemiluminescence (CL) of the luminol/N-bromosuccinimide system. A study on the enhancement mechanism via CL, fluorescence and electron paramagnetic resonance spectroscopy showed that the effect most probably is due to electrostatic interaction between the C-dots and the luminol anion which facilitates electron transfer from luminol anion to the N-bromosuccinimide oxidant. CL intensity is linearly related to the concentration of the C-dots in the range between 1.25 and 20 mu g mL(-1). The detection limit is 0.6 mu g mL(-1) (at an S/N of 3).
引用
收藏
页码:805 / 811
页数:7
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