Experimental measurements of solvation forces in nonpolar liquids
Experimental measurements of solvation forces in nonpolar liquids
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非极性液体中溶剂化力的实验测量
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
H. Christenson
中科院分区：
文献类型：
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作者：
H. Christenson
测量了浸泡在四氯甲烷、苯和2，2，4-三甲基戊烷中的分子光滑云母表面之间的作用力。在四氯甲烷和苯中，力定律是云母表面间隔的振荡函数，其周期等于平均分子直径，可测量的范围约为10个周期，即约5 nm。在这种分离之外，振荡合并成一条纯粹吸引人的“尾巴”。在2，2，4-三甲基戊烷中，力定律只表现出短程振荡行为，在2 nm以下；在较大的间隔时，力到处都是有吸引力的。与环己烷、八甲基环四硅氧烷和正辛烷的测量结果进行了比较，包括一些重复测量。当用每个液体的作用力曲线的平均周期来归一化距离标度时，苯、四氯甲烷、环己烷和八甲基环四硅氧烷这四个相当刚性的分子的结果非常相似；可能有微小的差异。
Forces between molecularly smooth mica surfaces immersed in tetrachloromethane, benzene, and 2,2,4‐trimethylpentane have been measured. In tetrachloromethane and benzene the force law is an oscillatory function of the separation between the mica surfaces, with a periodicity equal to the mean molecular diameter and a measurable range of appoximately ten periods, or about 5 nm. Beyond this separation, the oscillations merge into a purely attractive ‘‘tail’’. In 2,2,4‐trimethylpentane the force law shows only short‐range oscillatory behavior, below 2 nm; at larger separations the force is everywhere attractive. The results are compared with measurements on cyclohexane, octamethylcyclotetrasiloxane and n‐octane, including some repeat measurements. When the distance scale is normalized by the mean periodicity of the force curve for each liquid, the results for the four fairly rigid molecules benzene, tetrachloromethane, cyclohexane, and octamethylcyclotetrasiloxane are very similar; minor differences possibly ...