ИСТИНА

The effect of i-PrOH on the shape of cyclic voltammograms of tetra-Me-PyrDNO and the intensity of EPR signal of its radical cation was investigated. The catalytic currents were recorded at the oxidation of tetra-Me-PyrDNO at SWCNT and GC electrodes in the presence of i-PrOH. The effect of acid and water (as a base) on the catalytic process was studied The results were explained in terms of the E1C1E2C2 mechanism proposed early in for the two-stage electrode process characterized by catalytic current recorded at the second electrode stage. The overall two-electron catalytic oxidation of isopropyl alcohol in complex with the tetra-Me-PyrDNO radical cation was assumed to occur. It was shown that SWCNT electrodes can be used in the electrocatalytic oxidation of organic compounds in the presence of electrochemically generated tetra-Me-PyrDNO radical cation. It was shown that the catalytic efficiency of oxidation of organic substrate on GC and SWCNT electrodes increases with increasing the oxidation potential of di-N-oxide at substitution of phenazine-di-N-oxide (E0 = 1.22 V) used in for tetra-Me-PyrDNO (Ea = 1.37 V).