Peroxynitrous-Acid-Induced Chemiluminescence of Fluorescent Carbon Dots for Nitrite Sensing

被引：431

作者：

Lin, Zhen ^{[1
]}

Xue, Wei ^{[1
]}

Chen, Hui ^{[1
]}

Lin, Jin-Ming ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing Key Lab Microanalyt Methods & Instrumenta, Beijing 100084, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2011年 / 83卷 / 21期

基金：

中国国家自然科学基金;

关键词：

PERFORMANCE LIQUID-CHROMATOGRAPHY; ELECTROGENERATED CHEMILUMINESCENCE; WATER; NITRATE; DECOMPOSITION; NANOCRYSTALS; BRIGHT; OXYGEN;

D O I：

10.1021/ac202039h

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this work, chemiluminescent (CL) property of the carbon dots in the presence Of peroxynitrous acid was studied. Peroxynitrous acid is formed by online mixing of nitrite and acidified hydrogen peroxide. The CL intensity was increased linearly with nitrite concentration in the range from 1.0 x 10(-7) M to 1.0 x 10(-5) M, and the detection limit was 5.3 x 10(-8) M (signal-to-noise ratio of S/N = 3). This method has been successfully applied to the determination of nitrites in pond water, river water, and pure milk, with recoveries in the range of 98%-108%. The CL mechanism of the peroxynitrous acid-carbon dots system was investigated using the CL, ultraviolet-visible light (UV-vis), and electron paramagnetic resonance (EPR) spectra. The electron-transfer annihilation of hole-injected and electron-injected carbon dots could mainly account for the CL emission, which sheds new light on the optical properties of the carbon dots.

引用

页码：8245 / 8251

页数：7

共 40 条

[1] Micell-mediated extraction for the spectrophotometric determination of nitrite in water and biological samples based on its reaction with p-nitroaniline in the presence of diphenylamine [J].