Molecular Association and Hydration Behavior of 2-<i>n</i>-Butoxyethanol in Aqueous Solution

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  • Satokawa Yuichi
    Central Research Laboratories, DIC Corporation United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology
  • Shikata Toshiyuki
    United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology Graduate School of Agriculture, Tokyo University of Agriculture and Technology

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  • Molecular Association and Hydration Behavior of 2-n-Butoxyethanol in Aqueous Solution

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<p>Broadband dielectric spectrum measurements up to 50 GHz have been conducted for aqueous solution of 2-n-butoxyethanol (2BE) over a wide concentration range to investigate the state of molecular association of 2BE in aqueous solution. All the obtained dielectric relaxation spectra can be well decomposed into multiple Debye-type relaxation functions. The number of necessary relaxation modes clearly depended on the concentration of 2BE and was reasonably correlated with the molecular association state change of 2BE in aqueous solution. The concentration dependence of hydration number per 2BE molecule slightly decreased above a critical concentration for molecular association formation like micelles due to intermolecular hydrogen bonds formation between 2BE molecules.</p>

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