Thermodynamic and Spectroscopic Study of a Molecular Rotaxane Containing a Bolaform Surfactant and β-Cyclodextrin
作者： G. González-Gaitano , A. Guerrero-Martínez , F. Ortega , G. Tardajos
DOI: 10.1021/LA001235R
关键词:
摘要: A thermodynamic and proton NMR spectroscopy study of a bolaform type surfactant, docosane 1,22-bis(trimethylammonium bromide), has been carried out in water the presence β-cyclodextrin (β-CD) at 298 K. Density sound velocity data for aqueous solutions both systems were analyzed to calculate molar apparent partial volumes adiabatic compressibilities. For binary system, compressibilities as function concentration have obtained. Compressibility indicate that monomer or micelle form, is partially folded. ternary remarkable increase properties surfactant observed infinite dilution with respect value shift critical an extension points complexes predominantly 2:1 stoichiometry. The values transfer dilutio...
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