Show simple item record

Authordc.contributor.authorJullian Matthaei, Carolina 
Authordc.contributor.authorBrossard, Victor es_CL
Authordc.contributor.authorGonzález, Iván es_CL
Authordc.contributor.authorAlfaro, Muriel es_CL
Authordc.contributor.authorOlea Azar, Claudioes_CL
Admission datedc.date.accessioned2011-06-15T14:58:56Z
Available datedc.date.available2011-06-15T14:58:56Z
Publication datedc.date.issued2011-04
Cita de ítemdc.identifier.citationJOURNAL OF SOLUTION CHEMISTRY Volume: 40 Issue: 4 Pages: 727-739 Published: APR 2011es_CL
Identifierdc.identifier.issn0095-9782
Identifierdc.identifier.otherDOI: 10.1007/s10953-011-9674-6
Identifierdc.identifier.urihttp://repositorio.uchile.cl/handle/2250/121301
General notedc.descriptionArtículo de publicación ISIes_CL
Abstractdc.description.abstractThe slightly water-soluble flavonoid kaempferol (KAE) and its inclusion complexes with beta-cyclodextrin (beta CD), hydroxypropyl-beta-cyclodextrin (HP beta CD) or heptakis-2,6-O-dimethyl-beta-cyclodextrin (DM beta CD) were investigated. The stoichiometric ratios and association constants describing the extent of the formation of the complexes have been determined. Binding constants, estimated from fluorescence studies at different temperatures, were analyzed so as to gain information about the mechanisms involved in the association processes. The thermodynamic data for the inclusion of KAE in DM beta CD and HP beta CD indicated that it is mainly enthalpy-driven whereas for beta CD it is an entropy-driven process. Complex formation was monitored by two-dimensional ROESY experiments through the detection of intramolecular dipolar interaction. ROESY experiments provided data indicating that the B-ring of kaempferol is immersed in the apolar cavity with the A- and C-ring protruding from the wider rim for the three cyclodextrins studied. The antioxidant studies of KAE and CDs complexes showed an increment in its antioxidant activity. The complexes behave as better antioxidants than kaempferol alone.es_CL
Lenguagedc.language.isoenes_CL
Publisherdc.publisherSPRINGER/PLENUM PUBLISHERSes_CL
Keywordsdc.subjectKaempferoles_CL
Títulodc.titleCyclodextrins-Kaempferol Inclusion Complexes: Spectroscopic and Reactivity Studieses_CL
Document typedc.typeArtículo de revistaes_CL


Files in this item

Icon

This item appears in the following Collection(s)

Show simple item record