Accessible Requires Authentication Published by De Gruyter September 9, 2013

Effect of Cationic Surfactant on the Oxidation of Galactose by N-Bromophthalimide in the Presence of Acidic Medium: A Kinetic and Mechanistic Study

Einfluss eines kationischen Tensids auf die Oxidation von Galactose mit N-Bromphthalimid im sauren Medium: Eine kinetische und mechanistische Studie
Supriya Biswas, Samta Deshpande, Santosh K. Verma and Savita Nayak

Abstract

The effect of cationic surfactant on the oxidation of galactose by N-bromophthalimide in the presence of acidic medium at 308 K has been studied. The order of reaction with respect to [Gal], [oxidant], and [H+] were found to be fractional, first, and negative fractional order, respectively. The effects of KCl, KBr, phthalimide and mercuric acetate have also been studied and summarized. The rate of reaction decreased with an increase in dielectric constant of the medium. The effect of cationic surfactant cetylpyridinium chloride (CPC) has been studied. CPC retards the rate of reaction. Thermodynamic and activation parameters have been evaluated.

Kurzfassung

Es wurde der Einfluss eines kationischen Tensids auf die Oxidation von Galactose mit N-Bromphthalimid im sauren Medium bei 308 K untersucht. Die Reaktion besitzt bezüglich der Galactosekonzentration [Gal] eine gebrochene, in Bezug auf die Protonenkonzentration [H+] eine negative Ordnung, und ist in Bezug auf die Konzentration des Oxidationsmittels [Oxidationsmittel] von erster Ordnung. Die Einflüsse von KCl, KBr, Phthalimid und Quecksilberacetat wurden ebenfalls untersucht und zusammengefasst. Die Reaktionsgeschwindigkeit nahm mit steigender dielektrischer Konstante des Mediums ab. Der Einfluss des kationischen Tensids Cetylpyridiniumchlorid (CPC) wurde untersucht, CPC verlangsamt die Reaktionsgeschwindigkeit. Die thermodynamischen und Aktivierungsparameter wurden berechnet.


1 Dr. Santosh Kumar Verma, Assistant Professor, Department of Applied Chemistry, Shri Shankaracharya Institute of Technology & Management Junwani, Bhilai, Chhattisgarh, Pin 490020India, Tel.: +91-9098547916, E-Mail:

Dr. Santosh Kumar Verma is Assistant Professor at Department of Applied Chemistry, Shri Shankaracharya Institute of Technology & Management, Bhilai (India). He has been Senior Research Fellow (CSIR Project) at School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, India. He has published 6 research papers. His research interest is to study the Micellar Enzymology and Physico-chemical properties of novel surfactants, microemulsion.

Ms. Samta Deshpande has completed M.Sc. (Physical Chemistry) from Govt. D.B.P.G. girls College, Raipur and M. Phil (Chemistry) from Dr. C.V. Raman University, Bilaspur. Presently, She is doing Ph.D. and also working as Sr. Assistant Professor at Department of Applied Chemistry, Shri Shankaracharya Institute of Technology & Management, Bhilai (India). Her research interest is micellar catalysis and surface chemistry.

Ms. Savita Nayak has completed M.Sc. (Chemistry) from Department of Chemistry, Kalyan P.G. College, Bhilainagar Durg (India) and presently working as Assistant Professor, at Department of Applied Chemistry, Shri Shankaracharya Institute of Technology & Management, Bhilai (India). She has published 1 research paper on International journal. Her research interest is micellar catalysis.

Dr. Supriya Biswas has completed M.Sc. and Ph.D. from School of studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, India. Presently, She is working as Associate Professor at Department of Applied Chemistry, Shri Shankaracharya College of Engineering & Technology, Bhilai (India). She has published several research papers. Her research interest is micellar catalysis, kinetics and surface chemistry.


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Received: 2012-7-25
Revised: 2012-11-12
Published Online: 2013-09-09
Published in Print: 2013-07-15

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