Hunger, Johannes and Stoppa, Alexander and Thoman, Andreas and Walther, Markus and Buchner, Richard (2009) Broadband dielectric response of dichloromethane. CHEMICAL PHYSICS LETTERS, 471 (1-3). pp. 85-91. ISSN 0009-2614, 1873-4448
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A systematic study of the dielectric response of dichloromethane over a broad frequency range (8: 5 <= nu/GHz <= 1000; <= 4.3 THz at 25 degrees C) at temperatures from 5 to 35 degrees C is reported. The spectra are best described by a superposition of three contributions. The dominating loss peak at similar to 70 GHz, fitted by a modified Debye equation accounting for inertial rise, represents the rotational diffusion of molecular dipoles. Additionally, two libration modes contribute, which are described by damped harmonic oscillators of resonance frequencies similar to 0.9 THz and similar to 2.1 THz. While the latter modes reflect the anisotropy of the dichloromethane molecule, the diffusive reorientation at long times appears to be rather isotropic. (C) 2009 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INFRARED-ABSORPTION; MOLECULAR-DYNAMICS; COMPLEX PERMITTIVITY; METHYLENE-CHLORIDE; REFRACTIVE-INDEX; IONIC LIQUID; NEAT LIQUIDS; RELAXATION; CH2CL2; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Sep 2020 08:07 |
| Last Modified: | 21 Sep 2020 08:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29273 |
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