Effect of AOT/Heptane Reverse Micelles on Oxidation of Ferroin by Metaperiodate: Kinetic and Mechanistic Aspects

Year 2023, Volume: 10 Issue: 4, 1099 - 1106, 11.11.2023

Leela Kumari Bodasingi , Shyamala Pulipaka , Venkata Nagalakshmi Kilana

https://doi.org/10.18596/jotcsa.1226805

Abstract

A kinetic study of the oxidation of Ferroin, [Fe(phen)3]2+ by metaperiodate (IO4-) has been carried out in AOT/heptane reverse micelles by changing W = ([H2O]/[AOT]) and AOT concentration. The reaction order is first order with respect to Ferroin, while zero order with respect to IO4-. The reaction rate is faster in aqueous medium compared to AOT reverse micelles by eight times. The oxidation rate increases with an increase in the value of W (at fixed surfactant concentration, [AOT]) and decreases with AOT concentration. The effect of W on rate is elucidated based on the low dielectric constant of the water pool. Berezin's pseudo-phase model has been applied to explain the effect of AOT on rate.

Keywords

Ferroin, periodate, AOT, reverse micelles, water pool

Project Number

MOES/ICMAM – PD/Supply. Order/81/2017.

Thanks

P. Shyamala thanks the Ministry of Earth Sciences (MOES), National Centre for Coastal Research (NCCR), and the Government of India for financial support under major project No MOES/ICMAM – PD/Supply. Order/81/2017.

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