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Micellar Catalysis on 1,10-Phenanthroline Promoted Chromic Acid Oxidation of Glycerol in Aqueous Media

Mizellare Katalyse der Oxidation von Glycerin mit Chromsäure in wässriger Lösung durch 1,10-Phenanthrolin
  • Sumanta K. Ghosh , Rumpa Saha , Aniruddha Ghosh , Kakali Mukherjee and Bidyut Saha

Abstract

On pseudo-first order conditions, the monomeric species of Cr(VI) was found to be kinetically active in the absence of phenanthroline (phen) whereas in the phen-promoted path, the Cr(VI)-phen complex undergoes a nucleophilic attack by glycerol to form a ternary complex which subsequently experience a redox decomposition leading to glyceraldehydes and Cr(III)-phen complex. The effect of the cationic surfactant, cetyl pyridinium chloride (CPC); anionic surfactant, sodium dodecyl sulphate (SDS) and nonionic surfactant, triton X-100 (TX-100) on the unpromoted and phen-promoted path have been studied. Micellar effects have been explained by considering the preferential partitioning of reactants between the micellar and aqueous phase.

Kurzfassung

Unter der Bedinung der Pseudo-Ersten-Ordnung wurde gefunden, dass die monomere Spezies Cr(VI) in Abwesenheit von Phenanthroliln (phen) kinetisch aktiv ist. Auf dem durch phen beschleunigten Reaktionsweg führt der Cr(VI)-phen-Komplex einen nucleophilen Angriff auf das Glycerin aus, wodurch ein ternärer Komplex ensteht. Dieser wird nachfolgend reduziert zu Glyzerinaldehyd und zum Cr(III)-phen-Komplex. Der Einfluss des kationischen Tensids Cetylpyridiniumchlorid (CPC), des anionischen Tensids Natriumdodecylsulfat (SDS) und des nichtionischen Tensids Triton X-100 (TX-100) auf die unbeschleunigte und auf die mit phen beschleunigte Reaktion wurde untersucht. Der Einfluss der Mizellen wurde damit erklärt, dass die Reaktionspartner sich vorrangig zwischen der mizellaren und der wässrigen Phase verteilen.


Dr. Bidyut Saha, Homogeneous Catalysis Laboratory, Department of Chemistry, The University of Burdwan, Burdwan-713104, WB, India, E-Mail:

Sumanta Kr. Ghosh: He was born in Burdwan, in 1974. He passed his M.Sc degree from the Visva-Bharati and got NET-CSIR fellowship on the year 1999. He is working in my lab in “Inorganic Reaction Mechanism and Catalysis” division.

Rumpa Saha: She was born in Raghudevpur, in 1987. She passed her M.Sc degree from the University of Burdwan in 2009 and got NET-CSIR fellowship on the year 2009. She is working in my lab in “Bio-remediation” division.

Aniruddha Ghosh: He was born in Raniganj, in 1988. He passed his M.Sc degree from the University of Burdwan in 2010 and got NET-UGC fellowship on the year 2010. He is working in my lab in “Bio-remediation” division.

Kakali Mukherjee: She was born in Bankura, in 1988. She passed her M.Sc degree from the University of Burdwan in 2011 and got NET-LS fellowship on the year 2010. She is working in my lab in “Bio-remediation” division.

Dr. Bidyut Saha: He was born in Birbhum, WB, India in 1975. He obtained his Ph.D degree from Visva Bharati University, India in 2007. He was a visiting scientist for the year 2009–2010 in the Department of Chemistry, UBC, Canada. Dr. Saha is presently working as an Assistant Professor in the Department of Chemistry, Burdwan University, India His area of interests is bioremediation of toxic metal, micellar catalysis and inorganic reaction mechanism. He has already published twenty four papers in international journals.


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Received: 2011-12-22
Revised: 2012-03-04
Published Online: 2013-04-05
Published in Print: 2012-09-01

© 2012, Carl Hanser Publisher, Munich

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