Ultrasonic study in aqueous solutions of alcohols with methoxyl and propoxyl groups.
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概要
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Ultrasonic absorption, velocity and density measurements were carried out in aqueous solutions of 1-methoxy-2-propanol and 3-(3-methoxypropoxy)propanol as a function of their concentrations at 25°C. A single ultrasonic relaxational phenomenon was observed in both solutions in the frequency range from 6.5 to 220 MHz. The cause was attributed to a perturbation of an equilibrium associated with the solute solvent interaction, AB(<U>Remark: Graphics omitted.</U>)A+B, from the concentration dependences of the relaxation frequency and the amplitude of the relaxational absorption. The rate and thermodynamic parameters were determined for the above process. It was found that the methoxyl group introduced in alcohol molecule acted as a water structure breaker while the propoxyl group promoted the water structure. Speculation of excess ultrasonic absorption in various monohydroxy alcohol aqueous solutions was carried out from the present data. In order to further confirm the participation of the solvent water molecule in the observed relaxation process, absorption measurements were carried out in methanol, dimethyl sulfoxide, and their mixed solvents with water for 3-(3-methoxypropoxy)propanol.
- 公益社団法人 日本化学会の論文
著者
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Nishikawa Sadakatsu
Department Of Applied Chemistry Faculty Of Science And Engineering Saga University
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Moritsubo Yumiko
Department of Chemistry, Faculty of Science and Engineering, Saga University
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Matsuo Fumiharu
Department of Chemistry, Faculty of Science and Engineering, Saga University
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Endo Yosiaki
Department of Chemistry, Faculty of Science and Engineering, Saga University
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