Strong effect of a solid surface on a liquid-phase radical chain chemiluminescence reaction. Oxidation of UIV by dioxygen

The reaction of uranium(IV) with O₂ in aqueous solutions of HClO₄ is accompanied by chemiluminescence (CL). The CL intensity and the reaction kinetics are appreciably affected by introduction of the glass beads with a radius of 1 mm. In the presence of 1600 beads (the surface area of the glass is 200 cm²), the yield of CL dereases 32-fold. The effect of the solid surface on the kinetic and chemiluminescence parameters of the liquid-phase radical chain reaction is due to the increased role of chain termination upon heterogeneous decay of the HO ₂ ^. and^.OH radicals.