کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1404538 | 1501914 | 2006 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of temperature on wideband water spectra: Semi-phenomenological calculation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The results of analytical calculation of the complex permittivity ε and of the absorption coefficient α are presented for the temperature range extending from â5.6 °C for supercooled water to 81.4 °C. Dielectric response is modeled by two water fractions with lifetimes from 0.1 to 0.25 ps. One fraction comprises rigid permanent dipoles librating rather freely in a narrow and deep hat-like potential well and the other fraction comprises H-bonded charged molecules performing: (a) fast elastic vibrations along the hydrogen bond; (b) elastic reorientations around this bond; and (c) non-harmonic bending vibration perpendicular to the H-bond. At low temperature the latter vibration is characterized by a noticeable association of water molecules. The calculation reveals the break in continuity of some fitted model parameters occurring in water at the temperature â300 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 798, Issues 1â3, 23 October 2006, Pages 75-88
Journal: Journal of Molecular Structure - Volume 798, Issues 1â3, 23 October 2006, Pages 75-88
نویسندگان
Vladimir I. Gaiduk, Derrick S.F. Crothers,