Unified Effect of Hydrophobic Hydration on the Dynamics and the Structure of Water Molecules in Lower Alcohol Aqueous Solutions
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概要
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After the analysis of the quasi-elastic neutron scattering (QENS) spectra of lower alcoholic aqueous solutions, we found that the parameter \alpha, which is the number fraction of hydrophobic hydrating water molecules, has an important role in describing the dynamics and other properties of these solutions. The diffusion coefficient D was obtained from QENS spectra using the relaxing cage model, and D was found to have the same linear relation against \alpha for ethyl alcohol, n-propyl alcohol, i-propyl alcohol, and t-butyl alcohol (with a small deviation) aqueous solutions. The excess molar volume and average hydration number of these solutions could also be expressed with common parameters, which are independent of the alcohol species.
- 2011-04-15
著者
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Maruyama Kenji
Faculty Of Science Niigata University
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Yamamuro Osamu
Neutron Scattering Laboratory Institute Of Solid State Physics University Of Tokyo
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Maruyama Kenji
Faculty of Science, Niigata University, Niigata 950-2181, Japan
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Nakada Masaru
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
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Kikuchi Tatsuya
Neutron Scattering Laboratory, Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Misawa Masakatsu
High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
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Yamamuro Osamu
Neutron Scattering Laboratory, Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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MISAWA Masakatsu
High Energy Accelerator Research Organization (KENS)
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