ABSTRACT

Peroxyoxalate chemiluminescence (POCL) was first reported in 1963 by Chandross [1], who observed emission of light from a mixture consisting of oxalyl

chloride, hydrogen peroxide, and the fluorescent compound 9,10-diphenylanthracene dissolved in 1,4-dioxane. The light emitted was found to be spectrally identi­ cal to the fluorescence emission spectrum of 9,10-diphenylanthracene. POCL is thus an indirect or sensitized type of chemiluminescence, as the intermediates or reaction products from the primary reaction do not emit a significant quantity of light. Instead, the in situ-generated intermediate transfers its energy to an energyaccepting fluorophore (denoted F in the following scheme), which becomes elec­ tronically excited (denoted F*) and subsequently emits light.