REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES

REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES

Diphenylpicrylhydracyl is a stable free radical that readily reacts with phenol groups. In the present work we have measured the reaction of DPPH with three alkyl gallates of different hydrophobicity: methyl gallate, propyl gallate, and octyl gallate. Experiments were carried out in acetate buffer (...

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Autores principales: CAMPOS,ANA, VILLALOBOS,CAROLINA, LISSI,EDUARDO
Lenguaje:English
Publicado: Sociedad Chilena de Química 2010
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400010
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spelling oai:scielo:S0717-970720100004000102011-05-25REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLESCAMPOS,ANAVILLALOBOS,CAROLINALISSI,EDUARDODiphenylpicrylhydracyl is a stable free radical that readily reacts with phenol groups. In the present work we have measured the reaction of DPPH with three alkyl gallates of different hydrophobicity: methyl gallate, propyl gallate, and octyl gallate. Experiments were carried out in acetate buffer (pH 5.0) in presence of several SDS concentrations. At surfactant concentrations higher than 20 mM, the gallates are almost totally associated to the micellar pseudophase. Under these conditions the rate of the reaction becomes almost independent of the length of the alkyl group. This indicates that the average localization of the gallate reactive group is almost independent of the solute hydrophobicity.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.55 n.4 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400010en10.4067/S0717-97072010000400010
institution Scielo Chile
collection Scielo Chile
language English
description Diphenylpicrylhydracyl is a stable free radical that readily reacts with phenol groups. In the present work we have measured the reaction of DPPH with three alkyl gallates of different hydrophobicity: methyl gallate, propyl gallate, and octyl gallate. Experiments were carried out in acetate buffer (pH 5.0) in presence of several SDS concentrations. At surfactant concentrations higher than 20 mM, the gallates are almost totally associated to the micellar pseudophase. Under these conditions the rate of the reaction becomes almost independent of the length of the alkyl group. This indicates that the average localization of the gallate reactive group is almost independent of the solute hydrophobicity.
author CAMPOS,ANA
VILLALOBOS,CAROLINA
LISSI,EDUARDO
spellingShingle CAMPOS,ANA
VILLALOBOS,CAROLINA
LISSI,EDUARDO
REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
author_facet CAMPOS,ANA
VILLALOBOS,CAROLINA
LISSI,EDUARDO
author_sort CAMPOS,ANA
title REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
title_short REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
title_full REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
title_fullStr REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
title_full_unstemmed REACTION OF ALKYL GALLATES WITH DIPHENYL PICRYLHYDRACYL RADICALS IN SDS MICELLES
title_sort reaction of alkyl gallates with diphenyl picrylhydracyl radicals in sds micelles
publisher Sociedad Chilena de Química
publishDate 2010
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400010
work_keys_str_mv AT camposana reactionofalkylgallateswithdiphenylpicrylhydracylradicalsinsdsmicelles
AT villaloboscarolina reactionofalkylgallateswithdiphenylpicrylhydracylradicalsinsdsmicelles
AT lissieduardo reactionofalkylgallateswithdiphenylpicrylhydracylradicalsinsdsmicelles
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