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.

Direct chemiluminescence determination of penicillin G potassium and a chemometrical optimization approach

“…The CL reaction is critically dependent on pH and occurs only above pH 7. Usually the CL reaction with H 2 O 2 occurs in alkaline solutions, perhaps due to the lesser extent of interference of hydronium ion on the • OH and • O 2 − radicals (17)(18)(19)(20)(21)(22). The buffer concentration did not affect the CL intensity up to 0.01 mol/L.…”

Oscillating chemiluminescence systems: state of the art

“…On the basis of known mechanisms of the oscillatory reaction (37), the CL reaction of TSC (49,50) and the CL reaction of 1,10-phenanthroline (51,52), the possible oscillating CL reaction mechanisms of TSC and 1,10-phenanthroline were briefly discussed by Sorouraddin and Iranifam (40,41). As mentioned before, the mechanism of CL-oscillating reaction consists of 30 kinetic steps involving 26 independent variables.…”

“…2 (38 (Fig. 4) (41). In the first system, comprising luminol-H2O2-KSCN-CuSO4-NaOH, narrow and slightly asymmetric light pulses of 4 s half-width were emitted at 424 nm with a period of 4-25 min depending on flow rate and concentrations in the CSTR applied in this study (39).…”

New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orbàn-Epstein Reaction): Inhibitory Effects by Diphenols

“…More recently, the different potentiometric responses of various inert electrodes were successfully interpreted using a simplified model involving 12 steps and 9 intermediates for the OE reaction . Other studies on the OE reaction have regarded new pulsating sensors to monitor oscillations , a conductometry technique for analytical applications , and a study of oscillating chemiluminescence induced by the addition of 1,10‐phenanthroline to the system .…”