{"title":"Cooperative Dynamics and Hydration of Aqueous D-Mannitol and <i>myo</i>-Inositol.","authors":"Iwona Płowaś-Korus, Paweł Korus, Richard Buchner","doi":"10.1021/acs.jpcb.4c07344","DOIUrl":null,"url":null,"abstract":"<p><p>The cooperative dynamics and hydration of D-mannitol and <i>m</i>yo-inositol in aqueous solution at 25 °C were investigated by broad-band dielectric relaxation spectroscopy (DRS) for solute concentrations <i>c</i> < 0.9M. The recorded spectra, covering the frequency range 0.05 ≤ ν/GHz ≤ 50, can be described as a superposition of three Debye-type relaxation processes. The determined total effective hydration numbers, <i>Z</i><sub>t</sub>, as well as the effective dipole moments, μ<sub>eff</sub>, of D-mannitol and <i>m</i>yo-inositol do not depend on solute concentration. The <i>Z</i><sub>t</sub> values obtained for both sugar alcohols are significantly smaller than that of the previously studied xylitol. In contrast to aqueous xylitol, the dielectric spectra also showed no indication of the formation of D-mannitol or <i>m</i>yo-inositol aggregates.</p>","PeriodicalId":60,"journal":{"name":"The Journal of Physical Chemistry B","volume":" ","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Journal of Physical Chemistry B","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1021/acs.jpcb.4c07344","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The cooperative dynamics and hydration of D-mannitol and myo-inositol in aqueous solution at 25 °C were investigated by broad-band dielectric relaxation spectroscopy (DRS) for solute concentrations c < 0.9M. The recorded spectra, covering the frequency range 0.05 ≤ ν/GHz ≤ 50, can be described as a superposition of three Debye-type relaxation processes. The determined total effective hydration numbers, Zt, as well as the effective dipole moments, μeff, of D-mannitol and myo-inositol do not depend on solute concentration. The Zt values obtained for both sugar alcohols are significantly smaller than that of the previously studied xylitol. In contrast to aqueous xylitol, the dielectric spectra also showed no indication of the formation of D-mannitol or myo-inositol aggregates.
期刊介绍：
An essential criterion for acceptance of research articles in the journal is that they provide new physical insight. Please refer to the New Physical Insights virtual issue on what constitutes new physical insight. Manuscripts that are essentially reporting data or applications of data are, in general, not suitable for publication in JPC B.
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