title: Carbon nanodots sensitized chemiluminescence on peroxomonosulfate-sulfite-hydrochloric acid system and its analytical applications.
abstract: In the present work, new water-soluble fluorescent carbon nanodots (C-dots) were prepared in a facile microwave pyrolysis approach in minutes by combining glycine and polyethylene glycol 200 (PEG 200). Transmission electron microscopy (TEM) measurements showed that the resulting C-dots had diameters of about 3 nm. (13)C NMR spectra further confirmed the presence of carbons (sp(2) and sp(3)) indicating a nanocrystalline core of the resulting C-dots with hydroxyl of PEG 200 covered outside. It was discovered that the prepared C-dots could dramatically enhance the chemiluminescence (CL) intensity of potassium peroxomonosulfate-sodium sulfite-hydrochloric acid (PSHA) reactions. UV-vis absorption and photoluminescence (PL) spectra indicated that the C-dots sensitized enhancements originated from their energy transfer and electron-transfer annihilation effects on the CL system. When the concentration of C-dots was 4×10(-5) M, and those of KHSO(5), Na(2)SO(3) and HCl were 1×10(-2) M, an excellent performance was obtained. The C-dots sensitized CL system was successfully applied to the determination of aliphatic primary amines in real water samples with satisfactory results.
authors.affiliation: Beijing Key Laboratory of Microanalytical Method and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhou
authors.forename: Gaowa
authors.initials: G
authors.lastname: Xing
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Ogawa
authors.forename: Jin-Ming
authors.initials: JM
authors.lastname: Lin