SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE

The partition of a series of substituted phenols between water and polymer micelles formed by Pluronic F-68 and F-127 has been studied. The formation of micelles by these block copolymers has been evidenced by steady-state fluorescence and dynamic light scattering. The data show that micelles and la...

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Autores principales:	ANDRÉS F.,OLEA, HÉCTOR,CARRASCO, LUIS,ESPINOZA, BETSABE,ACEVEDO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2014
Materias:	Pluronic block copolymers polymer micelles partition free energy of transfer critical micelle concentration fluorescence probing methods dynamic light scattering
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200011
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spelling	oai:scielo:S0717-970720140002000112014-11-05SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTUREANDRÉS F.,OLEAHÉCTOR,CARRASCOLUIS,ESPINOZABETSABE,ACEVEDO Pluronic block copolymers polymer micelles partition free energy of transfer critical micelle concentration fluorescence probing methods dynamic light scattering The partition of a series of substituted phenols between water and polymer micelles formed by Pluronic F-68 and F-127 has been studied. The formation of micelles by these block copolymers has been evidenced by steady-state fluorescence and dynamic light scattering. The data show that micelles and larger aggregates are formed above the critical micelle concentration. In presence of p-alkylphenols a micelle rearrangement occurs that leads to the formation of just one and large aggregate. This effect depends both on polymer and phenols structures. The partition coefficients and the standard free energies of transfer from the aqueous to the micellar phases were determined. The incremental free energy for a methylene group are 2.88 kJ mol-1 and 1.65 kJ mol-1 for F-127 and F-68, respectively. This difference is explained in terms of the core sizes that are determined by the length of the PPO block.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.59 n.2 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200011en10.4067/S0717-97072014000200011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pluronic block copolymers polymer micelles partition free energy of transfer critical micelle concentration fluorescence probing methods dynamic light scattering
spellingShingle	Pluronic block copolymers polymer micelles partition free energy of transfer critical micelle concentration fluorescence probing methods dynamic light scattering ANDRÉS F.,OLEA HÉCTOR,CARRASCO LUIS,ESPINOZA BETSABE,ACEVEDO SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
description	The partition of a series of substituted phenols between water and polymer micelles formed by Pluronic F-68 and F-127 has been studied. The formation of micelles by these block copolymers has been evidenced by steady-state fluorescence and dynamic light scattering. The data show that micelles and larger aggregates are formed above the critical micelle concentration. In presence of p-alkylphenols a micelle rearrangement occurs that leads to the formation of just one and large aggregate. This effect depends both on polymer and phenols structures. The partition coefficients and the standard free energies of transfer from the aqueous to the micellar phases were determined. The incremental free energy for a methylene group are 2.88 kJ mol-1 and 1.65 kJ mol-1 for F-127 and F-68, respectively. This difference is explained in terms of the core sizes that are determined by the length of the PPO block.
author	ANDRÉS F.,OLEA HÉCTOR,CARRASCO LUIS,ESPINOZA BETSABE,ACEVEDO
author_facet	ANDRÉS F.,OLEA HÉCTOR,CARRASCO LUIS,ESPINOZA BETSABE,ACEVEDO
author_sort	ANDRÉS F.,OLEA
title	SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
title_short	SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
title_full	SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
title_fullStr	SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
title_full_unstemmed	SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE
title_sort	solubilization of p-alkylphenols in pluronics f-68 and f-127 micelles: partition coefficients and effect of solute on the aggregate structure
publisher	Sociedad Chilena de Química
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200011
work_keys_str_mv	AT andresfolea solubilizationofpalkylphenolsinpluronicsf68andf127micellespartitioncoefficientsandeffectofsoluteontheaggregatestructure AT hectorcarrasco solubilizationofpalkylphenolsinpluronicsf68andf127micellespartitioncoefficientsandeffectofsoluteontheaggregatestructure AT luisespinoza solubilizationofpalkylphenolsinpluronicsf68andf127micellespartitioncoefficientsandeffectofsoluteontheaggregatestructure AT betsabeacevedo solubilizationofpalkylphenolsinpluronicsf68andf127micellespartitioncoefficientsandeffectofsoluteontheaggregatestructure
_version_	1718445517037371392

SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE

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