Oxidation of l-tyrosine by diperiodatocuprate(III) in CPC micellar medium, facilitated by Ru(III)

Abstract The oxidation of amino acids is interesting due to the different molecules generated by different oxidants. This research is crucial to understand the role of amino acids in redox processes and to identify the active species of Ru(III) and diperiodatocuprate(III) (DPC). The purpose of the present research is to analyze the effect of cationic surfactant on the Ru(III) catalysed oxidation of l -tyrosine ( l -Tyr) by DPC. The progression of the reaction was evaluated using the pseudo-first-order scenario as a metric for [OH − ], [DPC], ionic strength, [ l -Tyr], [Ru(III)], [IO 4 − ], [surfactant], and temperature. Over the range of concentrations studied, the observed reaction exhibits a kinetic order less than one with respect to both [OH − ] and [ l -Tyr], a negative fractional order with respect to [IO 4 − ], and a first-order dependence on [Ru(III)] and [DPC]. The observed constancy of the oxidation rate with electrolyte addition suggests a zero salt effect. The oxidation rate is markedly increased by Ru(III) solution acting as a catalyst at ppm concentration. The micellar media of cetylpyridinium chloride (CPC) significantly accelerates the rate of the desired reaction, achieving a fourfold increase. The compatibility of CPC with Ru(III) for the oxidation of l -Tyr using DPC is particularly noteworthy.