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Effect of Surfactants on Hydrolysis of Mono-N-ethyl-o-toluidine Phosphate

  • Homeshwari Yadav , S. A. Bhoite and A. K. Singh
Published/Copyright: March 11, 2016
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Tenside Surfactants Detergents
From the journal Tenside Surfactants Detergents Volume 53 Issue 2

Abstract

Hydrolysis of phosphate ester (Mono-N-ethyl-o-toluidine phosphate) in the presence of different surfactants has been studied at 303 K. The rate of reaction has been found to be first-order and fractional order kinetics with respect to [substrate] and [HCl] respectively. The cationic micelles of cetyltrimethylammonium bromide (CTAB), anionic micelles of sodium dodecyl sulfate (SDS) and nonionic micelles of Brij-35 enhanced the rate of reaction to a maximum value and thereafter, the increase in concentration of surfactant decreased the reaction rate. The rate of reaction increased with increase of dielectric constant of the medium. The variation in the rate of hydrolysis by micelles was treated by considering the Menger-Portnoy, Piszkiewicz's and Berezin kinetic models. The various thermodynamic parameters have also been evaluated. The added salts viz KCl, KNO3, K2SO4 enhanced the rate of reaction in the presence of cationic, anionic and non-ionic micelles. The kinetic parameters i. e. micellar phase (kΨ) and binding constant (KS) were determined from the rate (surfactant) profile.

Kurzfassung

Der Einfluss von unterschiedlichen Tensiden auf die Hydrolyse von Phosphatester (Mono-N-ethyl-o-toluidinphosphat) wurde bei 303 K untersucht. Die Reaktionsgeschwindigkeit zeigt ein Verhalten erster Ordnung. Eine gebrochene Ordnungskinetik wird für die Konzentration des Substrats [Substrat] und der Salzsäure [HCl] beobachtet. Die kationischen Mizellen des Cetyltrimethylammoniumbromid (CTAB), die anionischen Mizellen von Natriumdodecylsulfat (SDS) und die nicht-ionischen Mizellen von Brij-35 erhöhten die Reaktionsgeschwindigkeit. Nach Erreichen eines Maximums nahm die Reaktionsgeschwindigkeit mit zunehmender Tensidkonzentration wieder ab. Die Reaktionsgeschwindigkeit zeigte auch eine Zunahme mit ansteigender dielektrischer Konstante des Agens. Die Änderung der Hydrolysegeschwindigkeit durch die Mizellen wurde im Rahmen der kinetischen Modelle von Menger-Portnoy, Piszkiewicz und Berezin analysiert. Die verschiedenen thermodynamischen Parameter wurden ebenfalls ermittelt. Der Zusatz von Salzen wie KCl, KNO3, K2SO4 erhöhte die Reaktionsgeschwindigkeit in Gegenwart von kationischen, anionischen und nicht-ionischen Mizellen. Die kinetischen Parameter wie die mizellare Phase (kΨ) und die Bindungskonstante (KS) wurden anhand des Tensid-Geschwindigkeitsprofils bestimmt.

Key words: Hydrolysis; Mono-N-ethyl-o-toluidine phosphate; Menger-Portnoy's; Piszkiewicz's and Berezin models
Stichwörter: Hydrolyse; Mono-N-ethyl-o-toluidinphosphat; Menger-Portnoy-Modell; Piszkiewicz-Modell; Berezin-Modell
*Correspondence address, Dr. S. A. Bhoite, School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, 492010 India, E-Mail:
**Dr. Ajaya Singh, Department of Chemistry Govt. V. Y. T. P. G. Autonomous College Durg, Chhattisgarh, 492010 India, E-Mail:

Prof. (Mrs.) S. A. Bhoite obtained her doctorate degree in 1981 from University of Pune, Pune (M. S.). She joined S. o. S. in Chemistry, Pt. Ravishankar Shukla University, Raipur as Lecturer in 1986 and rose to the position of Professor in 2010. She has over 30 years research and teaching experience. Her field of specialization is Physical & Nuclear Chemistry, Chemical Kinetics. She has more than 75 research papers published/presented in various National & International Journals/Conferences. Her current research interest is synthesis of Phosphate esters, their kinetic and biological study.

Miss. Homeshwari Yadav received a bachelor's degree in 2008 and master's degree in Organic Chemistry in 2010 from Pt. Ravishankar Shukla University, Raipur, India. Since 2010 she was working as research scholar in S. o. S. in Chemistry, Pt. Ravishankar Shukla University, Raipur, India. She has obtained University fellowship to continue her Ph. D. work. She has presented many research papers in different National and International Conferences.

Dr. A. K. Singh received his M. Sc. in inorganic chemistry from Poorvanchal University, Jaunpur, India, and his D. Phil. in physical chemistry in 2002 from the University of Allahabad, Allahabad, India. He was selected as an assistant professor of chemistry at Government Science College, Mungeli, Bilaspur, through the M. P. Public Service Commission, Indore in 1994. He was awarded a Teacher Research Fellowship to complete his research work in 2000 – 2002. He is currently assistant professor of chemistry at Govt. V. Y. T. P. G. Autonomous College, Durg, India, where he continues his research work, which is mainly related to transition metal-ion/micelle catalyzed oxidation kinetics and synthesis and characterization of thin films. He is the author of more than 85 papers related to these fields. He is member of several editorial board of the journals.

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Received: 2015-04-13
Accepted: 2015-06-22
Published Online: 2016-03-11
Published in Print: 2016-03-16

© 2016, Carl Hanser Publisher, Munich

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https://doi.org/10.3139/113.110424
Keywords for this article
Hydrolysis; Mono-N-ethyl-o-toluidine phosphate; Menger-Portnoy's; Piszkiewicz's and Berezin models

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Application
  4. Qualitative and Quantitative Analysis of Microbial Communities in Household Dishwashers in Germany
  5. Molecular Dynamics
  6. Mesoscopic Simulations on the Aggregate Behavior of Oligomeric Adamantane Surfactants in Aqueous Solutions
  7. Novel Surfactants
  8. Synthesis, Surface Activity and Application Properties of a Novel Ethoxylated Gemini Trisiloxane Surfactant
  9. Synthesis and Surface Active Properties of Novel Oligomer Betaine Surfactants
  10. Synthesis and Evaluation of Some Phenol-Based Anionic Gemini Amphiphiles: Studying Their Influence in the Preparation of Cu2O nanoparticles
  11. Scale Inhibition
  12. Preparation of a Multifunctional Terpolymer Inhibitor for CaCO3 and BaSO4 in Oil Fields
  13. Experimental and Theoretical Study on Corrosion Inhibition of Mild steel in 20 % Formic Acid Solution Using Schiff Base-Based Cationic Gemini Surfactant
  14. Physical Chemistry
  15. Dipeptide Glycyl-Glycine (Gly-Gly)–Ninhydrin Reaction: Effect of Alkanediyl-α,ω-bis(dimethylcetylammonium bromide) (16-s-16, s = 4, 5, 6) Gemini Surfactants on the Reaction Rate
  16. Interactions of Cellulase and Oleic Acid Solution Mixtures
  17. Effect of Surfactants on Hydrolysis of Mono-N-ethyl-o-toluidine Phosphate
  18. Thermodynamic Solution Properties of Benzalkonium Chloride in Aqueous and Ethanolic Media and its Interactions with Organized Assemblies of Anionic Surfactant Sodium Dodecyl Sulphate and Amino Acids
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