Interactions of water with pyridine and benzene studied by TOF-SIMS
Interactions of water with pyridine and benzene studied by TOF-SIMS
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TOF-SIMS 研究水与吡啶和苯的相互作用
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
R. Souda
中科院分区：
文献类型：
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作者：
R. Souda
TOF-SIMS用于表征重水和芳香族分子（如苯和吡啶）之间的弱分子间相互作用，以深入了解溶剂化作用。在110 K以上，由于氢键的形成，D2 O分子溶解在吡啶薄层中，但几乎不与苯层结合.当T >120 K时，苯分子通过疏水性水合溶解在D2 O层中，而当脱附温度达到180 K时，吡啶分子仍保留在D2 O层上。吡啶形成氢键与D2 O，但没有迹象表明疏水水合观察到的，除了在150 K左右的温度下，其中的D2 O分子的流动性将增加，由于相变的立方冰。从吡啶和苯的水合模式的比较，这表明，疏水水化倾向于淬灭的表面上，如果亲水水化共存。这是因为疏水相互作用是能量的。
TOF-SIMS is used to characterize the weak intermolecular interactions between heavy water and aromatic molecules such as benzene and pyridine in order to gain insight into solvation. The D2O molecules dissolve in the thin-layer bulk of pyridine above 110 K due to the formation of hydrogen bonds, but they are hardly incorporated in the benzene layer. The benzene molecules dissolve in the D2O layer via hydrophobic hydration for T >120 K, whereas the pyridine remains on the D2O layer up to the desorption temperature of 180 K. Pyridine forms hydrogen bonds with the D2O, but no indication of hydrophobic hydration is observed except at temperatures around 150 K where the mobility of the D2O molecules would be increased due to the phase transition to the cubic ice. From the comparison of the hydration patterns between pyridine and benzene, it is suggested that hydrophobic hydration tends to be quenched on the surface if the hydrophilic hydration coexists. This is because the hydrophobic interaction is energetica...