Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/30955
Title: Catalytic effect of CTAB reverse micelles on the oxidation of indigo carmine by periodate
Authors: Nagalakshmi, K V
Shyamala, P
Rao, P V Subba
Keywords: Kinetics;Oxidation;Periodate oxidation;Reverse micelles;Surfactants;Dyes;Indigo dyes;Water pools;CTAB
Issue Date: 19-Mar-2015
Abstract: The kinetics of oxidation of indigo carmine by periodate has been investigated in the presence of CTAB reverse micellar medium. The reaction obeys first order kinetics with respect to each of the reactants. The reaction is markedly catalysed in the presence of CTAB reverse micelles as compared to in aqueous medium under identical conditions. The significant increase in rate is attributed to the special properties of the water pool of reverse micelles which are controlled by a W parameter where W = ([H2O]/[CTAB]).  The specific rate constant, k3 {= k'/ [IO4] [H2O]} is found to be constant for all values of W > 4.4, implying that water is one of the reactants and is involved in the rate determining step. Such studies regarding the role of water cannot be obtained in conventional aqueous medium. The effect of CTAB has been analyzed using the Berezin pseudo-phase model.
Page(s): 351-355
URI: http://hdl.handle.net/123456789/30955
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.54A(03) [March 2015]

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