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首页> 外文期刊>Journal of magnetic resonance >Water-Surfactant Contact Studied by ~(19)F-~1H Heteronuclear Overhauser Effect Spectroscopy
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Water-Surfactant Contact Studied by ~(19)F-~1H Heteronuclear Overhauser Effect Spectroscopy

机译:〜(19)F-〜1H异核耗竭效应光谱研究水表面活性剂接触

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摘要

Intermolecular ~(19)F-~1H cross-relaxation is measured using heteronuclear Overhauser effect NMR spectroscopy (HOESY) in the micellar solution of cesium pentadecafluorooctanoate. The results are analyzed in terms of a weak ~1H-~(19)F cross-relaxation between the water protons and the fluorines in the fluoroalkyl chain and a strong ~(19)F-~(19)F cross-relaxation within the fluoroalkyl chain. The water-surfactant cross-relaxation indicates a water approach to the first CF_2 segment in the order of 2.0 A and a short (ns) water residence time. Evidence of fluorine hydration further inside the micelle is presented.
机译:分子间〜(19)F-〜1H交叉弛豫是使用五氟铯铯的胶束溶液中的异核Overhauser效应NMR光谱法(HOESY)测量的。根据水质子和氟代烷基链中的氟之间的〜1H-〜(19)F交叉松弛弱和分子内的〜(19)F-〜(19)F交叉弛豫强而分析结果。氟烷基链。水表面活性剂的交叉松弛表明水接近第一个CF_2片段的顺序为2.0 A,水停留时间短( ns)。胶束内部进一步存在氟水合的证据。

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