OPEN ACCESS | PEER-REVIEWED | RESEARCH ARTICLE | DOWNLOAD PDF | VIEW FULL-TEXT PDF | TOTAL VIEWS
Oxidative decolorization of carmosine with acidic chloramine-T: Spectrophotometric, kinetic and mechanistic chemistry
Jayachamarajapura Pranesh Shubha (1,*) , Puttaswamy Puttaswamy (2)
(1) Department of Chemistry, Don Bosco Institute of Technology, Kumbalagodu, Bangalore, 560060, India
(2) Department of Chemistry, Bangalore University, Central College Campus, Bangalore, 560001, India
(*) Corresponding Author
Received: 23 Sep 2011 | Revised: 13 Nov 2011 | Accepted: 21 Nov 2011 | Published: 31 Mar 2012 | Issue Date: March 2012
Carmosine is mainly used as a colorant in food industries. The oxidative decolorization of this dye is of greater significance and understanding of its kinetic and mechanistic aspects in redox reactions is important. Chloramine-T bears diverse chemical properties and has been exploited as oxidant for a variety of substrates. It is commercially available, inexpensive, non toxic, water tolerant and easy to handle. A systematic kinetic study of the oxidation of carmosine with acidic chloramine-T (CAT: TsNClNa here Ts = CH3C6H4SO2-) has been carried out in order to explore the mechanistic aspects of this redox system. UV-Visible spectrophotometry is used to monitor the reaction. Optimum conditions for the oxidative decolorization of carmosine with CAT were established. The kinetic results revealed that the reaction rate exhibits a first-order dependence each on [CAT]o and [carmosine]o and less than unit order dependence on [H+]. The reaction rate was examined for the effects of (a) p-toluenesulfonamide, (b) halide ions, (c) ionic strength, (d) dielectric permittivity and (e) solvent isotope. The reaction was studied at different temperatures and the activation parameters have been deduced. Oxidation products were characterized. Test for free radicals was found to be negative. The derived rate law based on the proposed mechanism is in complete agreement with the observed kinetic data.
Links for Article
| | | | | | |
| | | | | | |
| | |
Article MetricsThis Abstract was viewed 788 times | PDF Article downloaded 343 times
. Zollinger, H; Colour chemistry: Synthesis, properties and applications of organic dyes and pigments, New York, VCH, 1981.
. Perkowski, J.; Ledakowicz, S. Fibres Text East Eur. 2002, 38(3), 72-77.
. Waters, B. D.; Colour in Dyehouse Effluent, Cooper, P. Ed. Society of Dyers and Colourists, Bradford, 1995.
. Pearce, C. I.; Lloyd, J. R.; Guthrie, J. T. Dyes Pigments 2003, 58, 179-196.
. Umbuzeiro, G. D. A.; Freeman, H. S.; Warren, S. H.; De Oliveira, D. P.; Terao, Y.; Watanabe, T.; Claxton, L. D. Chemosphere 2005, 60, 55-64.
. Oakes, J.; Gratton, P. J. Chem. Soc. Perkin Trans 2 1998, 2201-2206.
. Puttaswamy; Shubha, J. P.; Jagadeesh, R. V. Trans. Metal Chem. 2007, 32, 991-999.
. Puttaswamy; Vinod, K. N.; Ninge, G. K. N. Dyes Pigments 2008, 78, 131-138.
. Vinod, K. N.; Puttaswamy; Ninge, G. K. N. Inorg. Chim. Acta 2009, 32, 2044-2051.
. Campbell, M. M.; Johnson, G. Chem. Rev. 1978, 78, 65-79.
. Banerji, K. K.; Jayaram, B.; Mahadevappa, D. S. J. Sci. Ind. Res. 1987, 46, 65-76.
. Agarwal, M. C.; Upadhyay, S. K. J. Sci. Ind. Res. 1990, 49, 13-32.
. Armesto, X. L.; Canle, L.; Garia, M. V.; Santaballa, J. Chem. Soc. Rev. 1998, 27, 453-460.
. Kolvari, E. E.; Ghorbani-Chogamarani, A.; Salehi, P.; Shirini, F.; Zolfigol, M. A. J. Iran. Chem. Soc. 2007, 4, 126-174.
. Murthy, A. R. V.; Rao, B. S. Proc. Indian Acad. Sci. 1952, 35, 69-70.
. Rangappa, K. S.; Manjunathaswamy, K.; Raghavendra, M. P.; Gowda, N. M. Int. J. Chem. Kinet. 2002, 34, 49-55.
. Kambo, N.; Upadhyay, S. K.; Jain, A. K. Oxid. Commun. 2003, 26, 502-509.
. Saldanha, R. J. D.; Ananda, S.; Venkatesha, B. M.; Gowda, N. M. M. J. Mol. Struct. 2002, 606, 147-154.
. Hegde, A. C.; Gowda, B. T. Oxid. Commun. 2000, 23, 546-564.
. Puttaswamy; Jagadeesh, R. V.; Nirmala, V.; Radhakrishna, A. J. Mol. Catal. A: Chem. 2005, 229, 211-220.
. Morris, J. C.; Salazar, J. A.; Wineman, M. A. J. Am. Chem. Soc. 1948, 70, 2036-2041.
. Akerloff, G. J. Am. Chem. Soc. 1932, 54, 4125-4139.
. Bishop, E.; Jennings, V. J. Talanta 1959, 1, 197-212.
. Hardy, F. F.; Johnston, J. P. J. Chem. Soc., Perkin Trans. 2 1973, 742-746.
. Pryde, B. G.; Soper, F. G. J. Chem. Soc. 1931, 1514-1418.
. Amis, E. S. Solvent effects on reaction rates and mechanisms, Academic Press, New York, 1966, pp. 1672.
. Collins, C. J.; Bowman M. N. Isotope effects in chemical reactions, Van Nostrand Reinhold, New York, 1970, pp. 267.
. Kohen, A.; Limbach, H. H. Isotope effects in chemistry and biology, CRC Press, Florida, 2006, pp. 827.
How to cite
The other citation formats (EndNote | Reference Manager | ProCite | BibTeX | RefWorks) for this article can be found online at: How to cite item
DOI Link: https://doi.org/10.5155/eurjchem.3.1.112-118.532
| | | | | | | | |
| | | | | |
Save to Zotero Save to Mendeley
European Journal of Chemistry 2012, 3(1), 112-118 | doi: https://doi.org/10.5155/eurjchem.3.1.112-118.532 | Get rights and content
- There are currently no refbacks.
© Copyright 2010 - 2021 • Atlanta Publishing House LLC • All Right Reserved.
The opinions expressed in all articles published in European Journal of Chemistry are those of the specific author(s), and do not necessarily reflect the views of Atlanta Publishing House LLC, or European Journal of Chemistry, or any of its employees.
Copyright 2010-2021 Atlanta Publishing House LLC. All rights reserved. This site is owned and operated by Atlanta Publishing House LLC whose registered office is 2850 Smith Ridge Trce Peachtree Cor GA 30071-2636, USA. Registered in USA.