Issue

Vol. 27 No. 12 (2015): Vol 27 Issue 12

Copyright (c) 2015 AJC

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Thermodynamic Investigation of Anionic Dye-Cationic Surfactant Ion Pair Formation in Water-Acetonitrile Mixed Solvent

https://doi.org/10.14233/ajchem.2015.19187
Mohammad Sh. Ramadan
Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Ibrahimia 21321, Alexandria, Egypt
Gehan M. Nabil
Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Ibrahimia 21321, Alexandria, Egypt
Ayman A. Elzayadi
Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Ibrahimia 21321, Alexandria, Egypt
Azza Sh. Farhood
Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Ibrahimia 21321, Alexandria, Egypt

Corresponding Author(s) : Gehan M. Nabil

gehan.nabil@gmail.com

Asian Journal of Chemistry, Vol. 27 No. 12 (2015): Vol 27 Issue 12

Abstract

Ion pair formation between anionic dye methyl orange and three cationic surfactants n-alkyltrimethylammonium bromide CnTAB (n = 12, 14, 16) was studied by conductance technique in pre-micellar region. The specific conductance of dye-surfactant mixtures was measured at different temperatures in water-acetonitrile mixed solvent. Two theoretical models dependent on conductance were used to calculate the equilibrium constants for dye-surfactant ion pair formation. The results showed that the equilibrium constants increase by increasing chain length of the surfactant in the same solvent and temperatures while decrease by increasing both temperature and acetonitrile content. Electrostatic and hydrophobic interactions are responsible for ion pair formation, hydrophobic interaction showed a predominate effect. The standard free energy change, standard enthalpy change and standard entropy change for the process were calculated and discussed.

Keywords

Methyl orange Surfactant Mixed solvents Conductance Ion pairs Thermodynamics parameters
Sh. Ramadan, M., M. Nabil, G., A. Elzayadi, A., & Sh. Farhood, A. (2015). Thermodynamic Investigation of Anionic Dye-Cationic Surfactant Ion Pair Formation in Water-Acetonitrile Mixed Solvent. Asian Journal of Chemistry, 27(12), 4474–4478. https://doi.org/10.14233/ajchem.2015.19187
Download Citation
Endnote/Zotero/Mendeley (RIS)
BibTeX
References
  1. O. Duman, S. Tunc and B. Kanci, Fluid Phase Equilib., 301, 56 (2011); doi:10.1016/j.fluid.2010.11.018.
  2. K. Holmberg, B. Jonsson, B. Kronberg and B. Lindman, Surfactants and Polymers in Aqueous Solution, John Wiley & Sons, edn 3 (2002).
  3. M. Rashidi-Alavijeh, S. Javadian, H. Gharibi, M. Moradi, A.R. Tehrani-Bagha and A.A. Shahir, Colloids Surf. A, 380, 119 (2011); doi:10.1016/j.colsurfa.2011.02.011.
  4. A.A. Shahir, M. Rashidi-Alavijeh, S. Javadian, J. Kakemam and A. Yousefi, Fluid Phase Equilib., 305, 219 (2011); doi:10.1016/j.fluid.2011.04.004.
  5. C. Kartal and H. Akbas, Dyes Pigments, 65, 191 (2005); doi:10.1016/j.dyepig.2004.07.003.
  6. A. Navarro and F. Sanz, J. Colloid Interf. Sci., 237, 1 (2001); doi:10.1006/jcis.2001.7428.
  7. B. Simoncic and M. Kert, Dyes Pigments, 54, 221 (2002); doi:10.1016/S0143-7208(02)00046-3.
  8. M. Nasiruddin Khan and A. Sarwar, Fluid Phase Equilib., 239, 166 (2006); doi:10.1016/j.fluid.2005.11.025.
  9. J. Mata, D. Varade and P. Bahadur, Thermochim. Acta, 428, 147 (2005); doi:10.1016/j.tca.2004.11.009.
  10. H. Dezhampanah, B.G. Choobar, R. Ansai and R. Firouzi, J. Progr. Color Colorants, Coatings, 6, 61 (2013).
  11. N. Hashemi and G. Sun, Ind. Eng. Chem. Res., 49, 8347 (2010); doi:10.1021/ie101001d.
  12. A.K. Jana and S. Rajavenii, Spectrochim. Acta A, 60, 2093 (2004); doi:10.1016/j.saa.2003.10.041.
  13. J. Yang, J. Colloid Interf. Sci., 274, 237 (2004); doi:10.1016/j.jcis.2004.03.028.
  14. V. Kubicek and K. Nemcova, Dyes Pigments, 68, 183 (2006); doi:10.1016/j.dyepig.2005.01.006.
  15. O. Yazdani, M. Irandoust, J.B. Ghasemi and S. Hooshmand, Dyes Pigments, 92, 1031 (2012); doi:10.1016/j.dyepig.2011.07.006.
  16. S. Göktürk, J. Photochem. Photobiol. Chem., 169, 115 (2005); doi:10.1016/j.jphotochem.2004.06.009.
  17. S. Bracko and J. Span, Dyes Pigments, 45, 97 (2000); doi:10.1016/S0143-7208(00)00016-4.
  18. S. Bracko and J. Span, Dyes Pigments, 50, 77 (2001); doi:10.1016/S0143-7208(01)00025-0.
  19. M. Sh.Ramadan, N.M. Elmallah and G.M. Nabil, Asian J. Chem., 16, 9059 (2013); doi:10.14233/ajchem.2013.14990.
  20. R.T. Buwalda and J.B.F.N. Engberts, Langmuir, 17, 1054 (2001); doi:10.1021/la001277f.
  21. B. Gohain, S. Sarma and R.K. Dutta, J. Mol. Liq., 142, 130 (2008); doi:10.1016/j.molliq.2008.05.015.
  22. C.R. Cantor, P.R. Schimmel and W.H. Freeman, Biophysical Chemistry, Part 1, San Francisco, pp. 341 (1980).
  23. P. Mukerjee and A.K. Ghosh, J. Am. Chem. Soc., 92, 6419 (1970); doi:10.1021/ja00725a006.
  24. P.W. Atkins and A.J. MacDermott, J. Chem. Educ., 59, 359 (1982); doi:10.1021/ed059p359.
  25. C. Tanford, The Hydrophobic Effect, Formation of Micelles and Biological Membranes, Wiley- Interscience, New York; p. 184, 559-560 (1974).
  26. A.A. Rafati, S. Azizian and M. Chahardoli, J. Mol. Liq., 137, 80 (2008); doi:10.1016/j.molliq.2007.03.013.
  27. H. Akbaş and C. Kartal, Dyes Pigments, 72, 383 (2007); doi:10.1016/j.dyepig.2005.09.024.
Read More
Author biographies is not available.
Download
PDF
Statistic
Read Counter : 0 Download : 1