title: Chemiluminescence of nitrogen-rich quantum dots in diperiodatoargentate(III) solution and its application in ferulic acid analysis.
abstract: A novel chemiluminescence (CL) system based on the reaction of fluorescent water-soluble nitrogen-rich quantum dots (N-dots) and diperiodatoargentate(III) (DPA) was developed. The prepared N-dots have a small size (≤10 nm) and high percentage of nitrogen (39.9 %), which exceeds the content of carbon in the same N-dots. The N-dots exhibit characteristic blue fluorescence under UV light and up-conversion luminescence. The relatively intense CL emission is based on the direct oxidation of N-dots by DPA. The CL emission may be attributed to the high nitrogen content and the special structure of the N-dots. The CL mechanism of N-dots and DPA was investigated by using CL, UV-Vis absorption, IR, fluorescence, and radical scavenging experiments. This investigation provides a way to study the optical properties of N-dots. The analytical applicability of the N-dots and DPA CL system in the determination of ferulic acid (FA) was explored. The CL intensity was linearly proportional to the concentration of ferulic acid from 3.0 × 10-7to 1.0 × 10-5g mL-1with a detection limit of 8.0 × 10-8g mL-1(3σ); the relative standard deviation was 2.4 % for 4.0 × 10-7g mL-1FA (n = 9). The proposed method was successfully applied to the determination of ferulic acid in Angelica sinensis. The study provides valuable insight into the role of nitrogen-rich quantum dots in CL.
authors: School of Chemistry and Chemical Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou, Guangdong, 510275, China.
authors: Zhaofu
authors: Z
authors: Fu
authors: School of Chemistry and Chemical Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou, Guangdong, 510275, China. cesgkl@mail.sysu.edu.cn.
authors: Gongke
authors: G
authors: Li
authors: School of Chemistry and Chemical Engineering, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou, Guangdong, 510275, China. huyufei@mail.sysu.edu.cn.
authors: Yufei
authors: Y
authors: Hu
mesh_terms: D029971:Angelica sinensis / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D003373:Coumaric Acids / Q000032:analysis*; D017022:Flow Injection Analysis / Q000379:methods; D057230:Limit of Detection; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods; D009584:Nitrogen / Q000737:chemistry*; D010084:Oxidation-Reduction; D045663:Quantum Dots / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D056831:Coordination Complexes; D003373:Coumaric Acids; C549491:diperiodatoargentate(III); C004999:ferulic acid; D009584:Nitrogen
keywords: Chemiluminescence; Diperiodatoargentate(III); Ferulic acid; Nitrogen-rich quantum dots