Cargando…
Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region
ABSTRACT: The densities and viscosities of dodecyltrimethylammonium bromide (DTAB), glycine, and rac-alanine in water and DTAB in glycine/alanine aqueous solutions have been determined at 288.15, 296.15, 304.15, 312.15, and 320.15 K. The apparent molar volumes (φ (v)) were obtained from these densit...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Vienna
2010
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4494842/ https://www.ncbi.nlm.nih.gov/pubmed/26166851 http://dx.doi.org/10.1007/s00706-010-0402-5 |
_version_ | 1782380159616155648 |
---|---|
author | Hossain, M. Farhad Biswas, Tapan Kumar Islam, M. N. Huque, M. Entazul |
author_facet | Hossain, M. Farhad Biswas, Tapan Kumar Islam, M. N. Huque, M. Entazul |
author_sort | Hossain, M. Farhad |
collection | PubMed |
description | ABSTRACT: The densities and viscosities of dodecyltrimethylammonium bromide (DTAB), glycine, and rac-alanine in water and DTAB in glycine/alanine aqueous solutions have been determined at 288.15, 296.15, 304.15, 312.15, and 320.15 K. The apparent molar volumes (φ (v)) were obtained from these density data. The limiting apparent molar volumes (φ (v)(0)) and experimental slopes (S (v)) were derived from the Masson equation and interpreted in terms of solute–solute and solute–solvent interactions. The sign of [δ(2)(φ (v)(0))/δT (2)](p), which corresponds to structure-making or structure-breaking properties of solutes, was determined. The viscosity coefficients A, B, and D were obtained from viscosity data on the basis of the Jones–Dole equation. Glycine/alanine in aqueous solutions exhibit structure-breaking behavior. In premicellar region, DTAB in aqueous solutions exhibits structure-breaking behavior, and DTAB in aqueous glycine/alanine solutions exhibits structure-making behavior. The free energy, enthalpy, and entropy of activation were calculated using the Nightingale and Benck, and Eyring equations. The values of (∆μ (1)(#) − ∆μ (0)(#)) for solutions were calculated. The effects of solutes on the structure of water were interpreted in terms of viscosities and the thermodynamic parameters. GRAPHICAL ABSTRACT: [Image: see text] |
format | Online Article Text |
id | pubmed-4494842 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Springer Vienna |
record_format | MEDLINE/PubMed |
spelling | pubmed-44948422015-07-09 Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region Hossain, M. Farhad Biswas, Tapan Kumar Islam, M. N. Huque, M. Entazul Monatsh Chem Original Paper ABSTRACT: The densities and viscosities of dodecyltrimethylammonium bromide (DTAB), glycine, and rac-alanine in water and DTAB in glycine/alanine aqueous solutions have been determined at 288.15, 296.15, 304.15, 312.15, and 320.15 K. The apparent molar volumes (φ (v)) were obtained from these density data. The limiting apparent molar volumes (φ (v)(0)) and experimental slopes (S (v)) were derived from the Masson equation and interpreted in terms of solute–solute and solute–solvent interactions. The sign of [δ(2)(φ (v)(0))/δT (2)](p), which corresponds to structure-making or structure-breaking properties of solutes, was determined. The viscosity coefficients A, B, and D were obtained from viscosity data on the basis of the Jones–Dole equation. Glycine/alanine in aqueous solutions exhibit structure-breaking behavior. In premicellar region, DTAB in aqueous solutions exhibits structure-breaking behavior, and DTAB in aqueous glycine/alanine solutions exhibits structure-making behavior. The free energy, enthalpy, and entropy of activation were calculated using the Nightingale and Benck, and Eyring equations. The values of (∆μ (1)(#) − ∆μ (0)(#)) for solutions were calculated. The effects of solutes on the structure of water were interpreted in terms of viscosities and the thermodynamic parameters. GRAPHICAL ABSTRACT: [Image: see text] Springer Vienna 2010-10-14 2010 /pmc/articles/PMC4494842/ /pubmed/26166851 http://dx.doi.org/10.1007/s00706-010-0402-5 Text en © The Author(s) 2010 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Original Paper Hossain, M. Farhad Biswas, Tapan Kumar Islam, M. N. Huque, M. Entazul Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title | Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title_full | Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title_fullStr | Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title_full_unstemmed | Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title_short | Volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
title_sort | volumetric and viscometric studies on dodecyltrimethylammonium bromide in aqueous and in aqueous amino acid solutions in premicellar region |
topic | Original Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4494842/ https://www.ncbi.nlm.nih.gov/pubmed/26166851 http://dx.doi.org/10.1007/s00706-010-0402-5 |
work_keys_str_mv | AT hossainmfarhad volumetricandviscometricstudiesondodecyltrimethylammoniumbromideinaqueousandinaqueousaminoacidsolutionsinpremicellarregion AT biswastapankumar volumetricandviscometricstudiesondodecyltrimethylammoniumbromideinaqueousandinaqueousaminoacidsolutionsinpremicellarregion AT islammn volumetricandviscometricstudiesondodecyltrimethylammoniumbromideinaqueousandinaqueousaminoacidsolutionsinpremicellarregion AT huquementazul volumetricandviscometricstudiesondodecyltrimethylammoniumbromideinaqueousandinaqueousaminoacidsolutionsinpremicellarregion |