Micellar effect on hydrolysis of 4-methyl-2-nitroaniline phosphate

Micellar effect on hydrolysis of 4-methyl-2-nitroaniline phosphate

The effect of anionic surfactant sodium dodecyl sulfate (SDS) on the hydrolysis of a substrate (mono-4-methyl-2-nitroaniline phosphate) by HCl was studied at 303 K. The reaction followed the first-order kinetics with respect to both HCl and the substrate. SDS effectively catalyzes this reaction, whi...

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Veröffentlicht in:Colloid journal of the Russian Academy of Sciences 2014-11, Vol.76 (6), p.765-773
Hauptverfasser: Bairagi, Bhawana, Bhoite, S. A., Singh, Ajaya Kumar
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Thin Films
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container_title Colloid journal of the Russian Academy of Sciences
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creator Bairagi, Bhawana
Bhoite, S. A.
Singh, Ajaya Kumar
description The effect of anionic surfactant sodium dodecyl sulfate (SDS) on the hydrolysis of a substrate (mono-4-methyl-2-nitroaniline phosphate) by HCl was studied at 303 K. The reaction followed the first-order kinetics with respect to both HCl and the substrate. SDS effectively catalyzes this reaction, which rate increases with the concentration of SDS due to an increase of dielectric constant of the medium. The kinetic data were fitted to Menger-Portnoy, Piszkiewicz and Berezin kinetic models to explain the observed micellar effects. The various activation parameters both in the presence and absence of SDS were evaluated; a reasonable mechanism was proposed. The rate constant in micellar phase, binding constant and index of cooperativity were calculated accordingly.
doi_str_mv 10.1134/S1061933X14060027
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Chemistry and Materials Science
Polymer Sciences
Surfaces and Interfaces
Thin Films
title Micellar effect on hydrolysis of 4-methyl-2-nitroaniline phosphate
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