title: 1,10-Phenanthroline-H2O2-KSCN-CuSO4-NaOH oscillating chemiluminescence system.
abstract: In this paper, oscillating chemiluminescence (CL), 1,10-phenanthroline H2O2-KSCN-CuSO4-NaOH system, was studied in a batch reactor. The system described is a novel, slowly damped oscillating CL system, generated by coupling the well-known Epstein-Orban, H2O2-KSCN-CuSO4-NaOH chemical oscillator reaction with the CL reaction involving the oxidation of 1,10-phenanthroline by hydrogen peroxide, catalyzed by copper(II) in alkaline medium. In this system, the CL reaction acts as a detector or indicator system of the far-from-equilibrium dynamic system. Narrow and slightly asymmetric light pulses of 1.2 s half-width are emitted at 440 nm with an emitted light time of 200-1000 s, induction period of 3.5-357 s and oscillation period of 28-304 s depending on the reagent concentrations. In this report the effect of the concentration variation of components involved in the oscillating CL system on the induction period, the oscillation period and amplitude was investigated and the parameters were plotted with respect to reagent concentrations. Copper concentration showed a significant effect on the oscillation period. The possible mechanism for the oscillating CL reaction was also discussed.
authors.affiliation: Analytical Chemistry Department, Faculty of Chemistry and University of Tabriz, Tabriz, Iran. soruraddin@tabrizu.ac.ir
authors.forename: M H
authors.initials: MH
authors.lastname: Sorouraddin
authors.forename: M
authors.initials: M
authors.lastname: Iranifam
mesh_terms: D055598:Chemical Phenomena; D019327:Copper Sulfate / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007202:Indicators and Reagents; D008163:Luminescent Measurements / Q000379:methods*; D010618:Phenanthrolines / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry; D013861:Thiocyanates / Q000737:chemistry
chemical_list: D007202:Indicators and Reagents; D010618:Phenanthrolines; D013861:Thiocyanates; D012972:Sodium Hydroxide; D006861:Hydrogen Peroxide; D019327:Copper Sulfate; C009941:potassium thiocyanate; C025205:1,10-phenanthroline