THE COMPLEX SUSCEPTIBILITY OF LIQUID WATER AS A 2-POTENTIAL SYSTEM OFREORIENTING POLAR-MOLECULES

Citation
Vi. Gaiduk et al., THE COMPLEX SUSCEPTIBILITY OF LIQUID WATER AS A 2-POTENTIAL SYSTEM OFREORIENTING POLAR-MOLECULES, Physica. A, 222(1-4), 1995, pp. 46-62
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ISSN journal
0378-4371
Volume
222
Issue
1-4
Year of publication
1995
Pages
46 - 62
Database
ISI
SICI code
0378-4371(1995)222:1-4<46:TCSOLW>2.0.ZU;2-B
Abstract
The theory, elaborated in previous works is applied to the calculation of liquid water wideband (0 < nu/cm(-1) < 1000) dielectric spectra. T hese comprise the Debye relaxation region at the centimeter/millimeter wavelengths and the two-humped absorption coefficient frequency depen dence in the far infrared (FIR) region. It is supposed that a major pa rt of the H2O molecules, called [L]-particles or [L]-molecules, are bo nded by relatively strong H-bonds; [L]-molecules perform librations of relatively small amplitude beta (beta is about 20 degrees). The remai ning molecules, called CRI-molecules, have more rotational/translation al mobility. A new microscopic molecular confined rotator/double well potential model of liquid water is developed. The contributions of [L] - and [R]-molecules to the complex permittivity epsilon are found on t he basis of the confined rotator (CR) and the double well potential (D WP) models, with rectangular and cos(2) theta intermolecular potential profiles, respectively. It is shown that the CR/DWP model gives a goo d description of the Debye relaxation and a qualitative description of the FIR dielectric spectra of water.