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首页> 外文期刊>RSC Advances >Insertion behavior of imidazolium and pyrrolidinium based ionic liquids into alpha and beta-cyclodextrins: mechanism and factors leading to host-guest inclusion complexes
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Insertion behavior of imidazolium and pyrrolidinium based ionic liquids into alpha and beta-cyclodextrins: mechanism and factors leading to host-guest inclusion complexes

机译：咪唑鎓和吡咯烷鎓类离子液体向α和β-环糊精的插入行为：导致主体-客体包合物的机理和因素

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摘要

Host-guest inclusion complexes formed from two ionic liquids (namely, 1-butyl-3-methylimidazolium chloride and 1-butyl-1-methylpyrrolidinium chloride) with alpha and beta-cyclodextrin have been investigated by physicochemical and spectroscopic methods as stabilizers, carriers and regulatory releasers of the guest molecules. H-1 NMR, 2D ROESY NMR, FT-IR and ESI MS studies confirm the inclusion phenomenon, whereas surface tension and conductivity studies indicate a 1 : 1 stoichiometry of the inclusion complexes. The interactions of cyclodextrin with the two named ionic liquids were characterized by density, viscosity and refractive index measurements, while the binding constants have been evaluated using a non-linear programme by the conductivity method, indicating a higher degree of encapsulation in the case of alpha-cyclodextrin than that in beta-cyclodextrin. The formation of the inclusion complexes was elucidated by hydrophobic effects, structural effects, electrostatic forces and H-bonding interactions.
机译：通过理化和光谱方法研究了由两种离子液体（即1-丁基-3-甲基咪唑鎓氯化物和1-丁基-1-甲基吡咯烷鎓氯化物）与α和β-环糊精形成的主体-客体包合物，作为稳定剂，载体和客体分子的调节释放物。 H-1 NMR，2D ROESY NMR，FT-IR和ESI MS研究证实了夹杂现象，而表面张力和电导率研究则表明夹杂物的化学计量比为1：1。环糊精与两种命名的离子液体的相互作用通过密度，粘度和折射率测量来表征，而结合常数已通过电导率法使用非线性程序进行了评估，表明在α情况下具有更高的包封度-环糊精比β-环糊精中的多。疏水作用，结构作用，静电力和氢键相互作用阐明了包合物的形成。

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