Enhanced chemiluminescence of cerium(IV)–Tween 85 system and the analytical application

Abstract

The oxidation reaction between cerium(IV) and Tween 85 in sulfuric acid medium produced weak chemiluminescence (CL). In this paper, it was found that citrate could strongly enhance the CL of cerium(IV)-Tween 85-polyphenol system. Based on studies of ultraviolet-visible spectra and CL spectra, the CL enhancement mechanism had been proposed. It was surmised that the light emission was from an excited oxygen molecular pair O2((1)Δg)O2((1)∑g(-)). The maximum emission wavelength was about 478 nm. The effects of 17 amino acids and 29 organic compounds on cerium(IV)-Tween 85-citrate CL were investigated by a flow injection procedure. This study showed the present system had a wide application for the determination of these compounds.

Energy Transfer Processes of Chemiluminescence Reaction Systems with Cerium(IV) Ions and Their Analytical Application: A Review

“…40-44. Moreover, it has been proved that the sensitised CL of the reaction mixture Ce(IV)-Tween85-citrate could be used for determination of polyphenol compounds, including 17 aminoacids [71]. The presence of surfactants in these CL generating systems additionally stabilises the singlet oxygen state [34].…”

Towards Screening the Enhance of Luminescence Properties of Modified Tannins in Alkaline Solution by a Fenton-Like Reaction

“…Polyphenols are exhibiting their antioxidant potential through a complex red-ox mechanism, which mainly is considered to be triggered after hydrogen abstraction followed by electron-donor transfer to molecules with unpaired electrons in their ground state. These unpaired electrons defi ne molecules as highly chemically active, that could act as oxidant species [4,5].…”