IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE

IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE

Differences in association constants values of cyclodextrin inclusion complexes can be found in the literature. Most of the times, different experimental conditions have been used leading to different results. This paper reports the association constants (Ka) values of two different cyclodextrins (C...

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Autores principales: YAÑEZ,C, GÜNTHER,G
Lenguaje:English
Publicado: Sociedad Chilena de Química 2014
Materias:
cyclodextrin
inclusion complexes
bentazon
association constant
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200028
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spelling oai:scielo:S0717-970720140002000282014-11-05IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUEYAÑEZ,CGÜNTHER,G cyclodextrin inclusion complexes bentazon association constant Differences in association constants values of cyclodextrin inclusion complexes can be found in the literature. Most of the times, different experimental conditions have been used leading to different results. This paper reports the association constants (Ka) values of two different cyclodextrins (CD), namely native beta-CD (PCD) and hydroxypropyl-PCD (HP-PCD) with bentazon (BTZ, herbicide used in control of broadleaf weeds and sedges in many crops). These constants were determined by spectrophotometric and fluorescence measurements carried out under the same experimental conditions, and they were compared with those previously obtained by electrochemical techniques. The association constant values for the BTZ/HP-PCD inclusion complex obtained by fluorescence measurements were lower than those expected taking into account the values obtained from the other techniques. Differences in the complexation of the guest with CD in the excited and basal state could explain these results.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=S0717-97072014000200028en10.4067/S0717-97072014000200028
institution Scielo Chile
collection Scielo Chile
language English
topic cyclodextrin
inclusion complexes
bentazon
association constant
spellingShingle cyclodextrin
inclusion complexes
bentazon
association constant
YAÑEZ,C
GÜNTHER,G
IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
description Differences in association constants values of cyclodextrin inclusion complexes can be found in the literature. Most of the times, different experimental conditions have been used leading to different results. This paper reports the association constants (Ka) values of two different cyclodextrins (CD), namely native beta-CD (PCD) and hydroxypropyl-PCD (HP-PCD) with bentazon (BTZ, herbicide used in control of broadleaf weeds and sedges in many crops). These constants were determined by spectrophotometric and fluorescence measurements carried out under the same experimental conditions, and they were compared with those previously obtained by electrochemical techniques. The association constant values for the BTZ/HP-PCD inclusion complex obtained by fluorescence measurements were lower than those expected taking into account the values obtained from the other techniques. Differences in the complexation of the guest with CD in the excited and basal state could explain these results.
author YAÑEZ,C
GÜNTHER,G
author_facet YAÑEZ,C
GÜNTHER,G
author_sort YAÑEZ,C
title IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
title_short IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
title_full IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
title_fullStr IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
title_full_unstemmed IS THE DETERMINATION OF THE ASSOCIATION CONSTANT OF CYCLODEXTRIN INCLUSION COMPLEXES DEPENDENT ON THE TECHNIQUE
title_sort is the determination of the association constant of cyclodextrin inclusion complexes dependent on the technique
publisher Sociedad Chilena de Química
publishDate 2014
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200028
work_keys_str_mv AT yanezc isthedeterminationoftheassociationconstantofcyclodextrininclusioncomplexesdependentonthetechnique
AT guntherg isthedeterminationoftheassociationconstantofcyclodextrininclusioncomplexesdependentonthetechnique
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