1H-NMR study of heavy metals complexation with hexakis(3,6-anhydro) tetrakis(2A,B,D,E-O-octyl) cyclomaltohexaose (OCT).

Debouzy, J C; Gadelle, A; Fauvelle, F; Nardin, R; Aous, S; Lhoste, F; Pailler, Y

Debouzy, J C; Gadelle, A; Fauvelle, F; Nardin, R; Aous, S; Lhoste, F; Pailler, Y.

Afiliación

Debouzy JC; CRSSA, Biological and Molecular Biophysics Lab., -La Tronche, France.

Boll Chim Farm ; 140(1): 9-14, 2001.

Article en En | MEDLINE | ID: mdl-11338780

RESUMEN

The selection of the cations bound by hexakis (3,6-anhydro) tetrakis (2A,B,D,E-O-octyl) cyclomatohexaose (OCT) was performed by thin layer chromatography. The three cations selected, UO(2)2+, Pb2+ and Hg2+ were then studied by 1H-NMR. A 2:1 OCT/cation stoichiometry was identified in the cases of UO(2)2+ and Pb2+. While UO(2)2+ binding (logK around 6) followed a fast exchange kinetics, a slow or intermediate complexation was found with Pb2+ (logK = 5.6) and Pb2+, respectively. In the latter case, the poor solubility of Hg2+ precluded to propose neither a stoichiometry nor an estimation of the affinity constant.

Asunto(s)

Quelantes/química; Ciclodextrinas/química; Metales Pesados/química; gamma-Ciclodextrinas; Cromatografía en Capa Delgada; Espectroscopía de Resonancia Magnética; Soluciones

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Quelantes / Metales Pesados / Ciclodextrinas / Gamma-Ciclodextrinas Idioma: En Revista: Boll Chim Farm Año: 2001 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Italia

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