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1H-nuclear magnetic resonance and phase solubility studies of the stoichiometries in 2,4-D: α-and β-cyclodextrins inclusion complexes

AuthorsPérez-Martínez, José Ignacio; Ginés, J.M.; Morillo González, Esmeralda ; Moyano Méndez, José Ramón
Issue Date2000
CitationJournal of Inclusion Phenomena and Macrocyclic Chemistry 37(1): 171-178 (2000)
AbstractThe interaction in solution between 2,4-dichlorophenoxyacetic acid with α-and β-cyclodextrins was evaluated by phase solubility studies. Association constants were calculated by this technique. The stoichiometries were 1 : 2 and 1 : 1 for the α-and β-cyclodextrin complexes, respectively. In order to corroborate the complexation and the knowledge of structural aspects of the host : guest interaction, proton nuclear magnetic resonance (1H-NMR) spectroscopy was employed. The application of the continuous variation technique corroborated the calculated complex stoichiometries by solubility assays. Complementary NOE studies were applied in order to corroborate the proposed complex structures.
Identifiersdoi: 10.1023/A:1008126304161
issn: 0923-0750
e-issn: 1573-1111
Appears in Collections:(IRNAS) Artículos
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