共 23 条
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).
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页码:805 / 811
页数:7
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