Micelle-catalysed redox reaction

Kaushik Mallick; Suresh Jewrajka; Narayan Pradhan; Tarasankar Pal

Micelle-catalysed redox reaction

Kaushik Mallick, Suresh Jewrajka, Narayan Pradhan, Tarasankar Pal

Indian Institute of Technology Kharagpur

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

The reduction of methylene blue (MB) by SnCl₂ has been studied in three different micelles. Micellar catalysis in the cationic and non-ionic micelles has been observed to occur because of the binding of the substrates onto the micellar surface by hydrophobic and/or electrostatic interaction. This binding increases the encounter probability, leading to an accelerated rate of reaction. Investigation with various salting-out and salting-in agents revealed that hydrophobic effect supersedes Coulombic interaction for the observed micellar catalysis. Under the same experimental condition the calculated first-order rate constant in water, cationic and non-ionic micelles is 0.086, 0.303 and 0.167 min^-1 respectively. The activation energy for the reaction in water and non-ionic micelles is found to be 40.32 and 21.42 kJ/mol, respectively.

Original language	English
Pages (from-to)	1408-1412
Number of pages	5
Journal	Current Science
Volume	80
Issue number	11
Publication status	Published - 10 Jun 2001
Externally published	Yes

ASJC Scopus subject areas

Multidisciplinary

Cite this

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title = "Micelle-catalysed redox reaction",

abstract = "The reduction of methylene blue (MB) by SnCl2 has been studied in three different micelles. Micellar catalysis in the cationic and non-ionic micelles has been observed to occur because of the binding of the substrates onto the micellar surface by hydrophobic and/or electrostatic interaction. This binding increases the encounter probability, leading to an accelerated rate of reaction. Investigation with various salting-out and salting-in agents revealed that hydrophobic effect supersedes Coulombic interaction for the observed micellar catalysis. Under the same experimental condition the calculated first-order rate constant in water, cationic and non-ionic micelles is 0.086, 0.303 and 0.167 min-1 respectively. The activation energy for the reaction in water and non-ionic micelles is found to be 40.32 and 21.42 kJ/mol, respectively.",

author = "Kaushik Mallick and Suresh Jewrajka and Narayan Pradhan and Tarasankar Pal",

year = "2001",

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T1 - Micelle-catalysed redox reaction

AU - Mallick, Kaushik

AU - Jewrajka, Suresh

AU - Pradhan, Narayan

AU - Pal, Tarasankar

PY - 2001/6/10

Y1 - 2001/6/10

N2 - The reduction of methylene blue (MB) by SnCl2 has been studied in three different micelles. Micellar catalysis in the cationic and non-ionic micelles has been observed to occur because of the binding of the substrates onto the micellar surface by hydrophobic and/or electrostatic interaction. This binding increases the encounter probability, leading to an accelerated rate of reaction. Investigation with various salting-out and salting-in agents revealed that hydrophobic effect supersedes Coulombic interaction for the observed micellar catalysis. Under the same experimental condition the calculated first-order rate constant in water, cationic and non-ionic micelles is 0.086, 0.303 and 0.167 min-1 respectively. The activation energy for the reaction in water and non-ionic micelles is found to be 40.32 and 21.42 kJ/mol, respectively.

AB - The reduction of methylene blue (MB) by SnCl2 has been studied in three different micelles. Micellar catalysis in the cationic and non-ionic micelles has been observed to occur because of the binding of the substrates onto the micellar surface by hydrophobic and/or electrostatic interaction. This binding increases the encounter probability, leading to an accelerated rate of reaction. Investigation with various salting-out and salting-in agents revealed that hydrophobic effect supersedes Coulombic interaction for the observed micellar catalysis. Under the same experimental condition the calculated first-order rate constant in water, cationic and non-ionic micelles is 0.086, 0.303 and 0.167 min-1 respectively. The activation energy for the reaction in water and non-ionic micelles is found to be 40.32 and 21.42 kJ/mol, respectively.

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M3 - Article

AN - SCOPUS:0011508651

SN - 0011-3891

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EP - 1412

JO - Current Science

JF - Current Science

IS - 11

ER -

Micelle-catalysed redox reaction

Abstract

ASJC Scopus subject areas

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