title: Carbonate interlayered hydrotalcites-enhanced peroxynitrous acid chemiluminescence for high selectivity sensing of ascorbic acid.
abstract: In this study, Mg-Al-carbonate layered double hydroxides (denoted as Mg-Al-CO(3) LDHs) were found to catalyze the chemiluminescence (CL) emission from peroxynitrous acid (ONOOH). The enhanced CL signals resulted from the concentration of peroxynitrite (ONOO(-)) onto the LDHs surface by electrostatic attraction, meaning that ONOO(-) can interact with the intercalated carbonate easily and effectively. Moreover, ascorbic acid can react with ONOO(-), or its decomposition products (e.g., ˙OH and ˙NO(2)), resulting in a decrease in the CL intensity from the Mg-Al-CO(3) LDHs-catalyzed ONOOH reaction. Based on these findings, a sensitive, selective and rapid CL method was developed for the determination of ascorbic acid using Mg-Al-CO(3) LDHs-catalyzed ONOOH as a novel CL system. The CL intensity was proportional to the concentration of ascorbic acid in the range from 5.0 to 5000 nM. The detection limit (S/N = 3) was 0.5 nM and the relative standard deviation (RSD) for nine repeated measurements of 0.1 μM ascorbic acid was 2.6%. This method has been successfully applied to determine ascorbic acid in commercial liquid fruit juices with recoveries of 97-107%. This work is not only of importance for a better understanding of the unique properties of LDHs-catalyzed CL but also of great potential for extensive applications in many fields, such as luminescence devices, bioanalysis, and labeling probes.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
authors.forename: Xu
authors.initials: X
authors.lastname: Teng
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
mesh_terms: D000536:Aluminum Hydroxide / Q000737:chemistry*; D001205:Ascorbic Acid / Q000032:analysis*; D001628:Beverages / Q000032:analysis; D002254:Carbonates / Q000737:chemistry*; D006358:Hot Temperature; D049449:Luminescence; D008276:Magnesium Hydroxide / Q000737:chemistry*; D030421:Peroxynitrous Acid / Q000737:chemistry*; D033362:Powder Diffraction; D055672:Static Electricity
chemical_list: D002254:Carbonates; D030421:Peroxynitrous Acid; C010467:hydrotalcite; D000536:Aluminum Hydroxide; D008276:Magnesium Hydroxide; D001205:Ascorbic Acid