EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES

ABSTRACT To gain more information about the effect of surfactant on salicylic acid derivatives, the stoichiometric protonation constants of 5-Sulphosalicylic acid and 5-Hydroxysalicylic acid in 0.0%-2.5% (w/v) cetyltrimethylammonium bromide (CTAB) - water mixtures were determined at an ionic strengt...

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Autores principales:	RAMANAIAH,M., SRI,S. GOUTHAM, BALAKRISHNA,M., RAJU,B. RAMA
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2017
Materias:	Protonation equilibria MINIQUAD75 Cetyltrimethylammonium bromide 5-Sulphosalicylic acid 5-Hydroxysalicylic acid
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000403677
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spelling	oai:scielo:S0717-970720170004036772018-04-02EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVESRAMANAIAH,M.SRI,S. GOUTHAMBALAKRISHNA,M.RAJU,B. RAMA Protonation equilibria MINIQUAD75 Cetyltrimethylammonium bromide 5-Sulphosalicylic acid 5-Hydroxysalicylic acid ABSTRACT To gain more information about the effect of surfactant on salicylic acid derivatives, the stoichiometric protonation constants of 5-Sulphosalicylic acid and 5-Hydroxysalicylic acid in 0.0%-2.5% (w/v) cetyltrimethylammonium bromide (CTAB) - water mixtures were determined at an ionic strength of 0.16 mol dm-3 and at 303 K. A potentiometric method was used and the calculation of constants was carried out using the computer program MINIQUAD75. These protonation constants values have been found to shift in micellar media as compared to those in pure water. The differences in the values have been attributed to the solvent properties of the interfacial and bulk phases involving contribution from the micellar surface potential in the case of charged micelles. The trend of log values of step-wise protonation constants with mole fraction of the medium have been explained based on specific solute-solvent interactions. In this study Distributions of species, percentage of species composition, protonation equilibria and effect of influential parameters on the protonation were also discussed.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.62 n.4 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000403677en10.4067/s0717-97072017000403677
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Protonation equilibria MINIQUAD75 Cetyltrimethylammonium bromide 5-Sulphosalicylic acid 5-Hydroxysalicylic acid
spellingShingle	Protonation equilibria MINIQUAD75 Cetyltrimethylammonium bromide 5-Sulphosalicylic acid 5-Hydroxysalicylic acid RAMANAIAH,M. SRI,S. GOUTHAM BALAKRISHNA,M. RAJU,B. RAMA EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
description	ABSTRACT To gain more information about the effect of surfactant on salicylic acid derivatives, the stoichiometric protonation constants of 5-Sulphosalicylic acid and 5-Hydroxysalicylic acid in 0.0%-2.5% (w/v) cetyltrimethylammonium bromide (CTAB) - water mixtures were determined at an ionic strength of 0.16 mol dm-3 and at 303 K. A potentiometric method was used and the calculation of constants was carried out using the computer program MINIQUAD75. These protonation constants values have been found to shift in micellar media as compared to those in pure water. The differences in the values have been attributed to the solvent properties of the interfacial and bulk phases involving contribution from the micellar surface potential in the case of charged micelles. The trend of log values of step-wise protonation constants with mole fraction of the medium have been explained based on specific solute-solvent interactions. In this study Distributions of species, percentage of species composition, protonation equilibria and effect of influential parameters on the protonation were also discussed.
author	RAMANAIAH,M. SRI,S. GOUTHAM BALAKRISHNA,M. RAJU,B. RAMA
author_facet	RAMANAIAH,M. SRI,S. GOUTHAM BALAKRISHNA,M. RAJU,B. RAMA
author_sort	RAMANAIAH,M.
title	EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
title_short	EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
title_full	EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
title_fullStr	EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
title_full_unstemmed	EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES
title_sort	effect of cationic micelles of cetyltrimethylammonium bromide on protonation equilibria of salicylic acid derivatives
publisher	Sociedad Chilena de Química
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000403677
work_keys_str_mv	AT ramanaiahm effectofcationicmicellesofcetyltrimethylammoniumbromideonprotonationequilibriaofsalicylicacidderivatives AT srisgoutham effectofcationicmicellesofcetyltrimethylammoniumbromideonprotonationequilibriaofsalicylicacidderivatives AT balakrishnam effectofcationicmicellesofcetyltrimethylammoniumbromideonprotonationequilibriaofsalicylicacidderivatives AT rajubrama effectofcationicmicellesofcetyltrimethylammoniumbromideonprotonationequilibriaofsalicylicacidderivatives
_version_	1714200917292613632

EFFECT OF CATIONIC MICELLES OF CETYLTRIMETHYLAMMONIUM BROMIDE ON PROTONATION EQUILIBRIA OF SALICYLIC ACID DERIVATIVES

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