کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413768 | 1506638 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural dynamics of water and its dielectric and absorption spectra in the range 0-800 cmâ 1
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A structural dynamics model is suggested that describes the complex permittivity and absorption spectra of water over the entire range of orientation polarization, 0 < ν < 800 cmâ 1. The mechanism of elementary motion of water molecules involves partial “dissociation” of some fragments of the tetrahedral network. Structural fragments are differentiated in which molecules rotate about different axes and have different moments of inertia. The experimental complex permittivity and absorption spectra were described using the confined rotator (I)/â¦/ confined rotator (N) theoretical scheme. The frequency boundary between the collective Debye process and quasi-resonant processes related to elementary water motions was thereby determined. The common features and differences between the spectra of ordinary and heavy water are explained for the entire frequency range. This data made it possible to provide a new interpretation of the band at â¼Â 200 cmâ 1. Spectral trends in the frequency range 5 < ν < 200 cmâ 1 are steered by the structural transitions of separate molecules and dimers realized in rotational-translational diffusion processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 125, Issues 2â3, 15 April 2006, Pages 130-138
Journal: Journal of Molecular Liquids - Volume 125, Issues 2â3, 15 April 2006, Pages 130-138
نویسندگان
Andrei K. Lyashchenko, Tamara A. Novskova,