Large enhancement of oscillating chemiluminescence with [Ru(bpy)₃]²⁺‐catalyzed Belousov–Zhabotinsky reaction in the presence of tri‐n‐propylamine

Abstract

Oscillating chemiluminescence enhanced by the addition of tri-n-propylamine (TPrA) to the typical Belousov-Zhabotinsky (BZ) reaction system catalyzed by ruthenium(II)tris(2.2'-bipyridine)(Ru(bpy)3 (2+) ) was investigated using a luminometry method. The [Ru(bpy)3 ](2+) /TPrA system was first used as the catalyst for a BZ oscillator in a closed system, which exhibited a shorter induction period, higher amplitude and much more stable chemiluminescence (CL) oscillation. The effects of various concentrations of TPrA, oxygen and nitrogen flow rate on the oscillating behavior of this system were examined. In addition, the CL intensity of the [Ru(bpy)3 ](2+) /TPrA-BZ system was found to be inhibited by phenol, thus providing a way for use of the BZ system in the determination of phenolic compounds. Moreover, the possible mechanism of the oscillating CL reaction catalyzed by [Ru(bpy)3 ](2+) /TPrA and the inhibition effects of oxygen and phenol on this oscillating CL system were considered.

Photo-Modulatable Potential Oscillation during Organic-Phase Iodization Reaction

“…Moreover, many organic synthesis systems or photoelectrochemical cells are taken place in organic solvents rather than aqueous solvent for most oscillation reaction. [25][26][27][28] The solvent can affect the reactivity, acidity and ions diffusion for almost every elementary steps, or even change the role of water concentration in the kinetic equation from a constant to a variable. Thus, it is important but challenging to explore possible chemical oscillation mechanism in organic-solvent dominated system.…”