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Heisler, Ismael A. and Meech, Steve R. 
ORCID: https://orcid.org/0000-0001-5561-2782
(2010)
Low-frequency isotropic and anisotropic Raman spectra of aromatic liquids.
The Journal of Chemical Physics, 132 (17).
ISSN 1089-7690
Abstract
The Raman spectra below 300 wavenumbers of six different aromatic molecular liquids have been measured with a time and polarization resolved optical Kerr effect technique. The isotropic and anisotropic contributions were determined to yield the complete third order response, and thus a more detailed description of the microscopic liquid dynamics. The anisotropic contributions accurately reproduced previously published results. Both the isotropic and anisotropic Raman spectral densities shift toward lower frequencies with decreasing molecular weights. The first moment of the isotropic spectral densities scales linearly with the inverse square root of the molecular weight, which is consistent with interaction-induced dynamics in these liquids being driven mainly by motions with a translational character. Also, the isotropic spectral densities could be fit to a single Bucaro–Litovitz function. The exponent d of this function increases monotonically with the inverse square root of the molecular weight. A possible physical origin of this behavior is discussed.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Centre for Photonics and Quantum Science |
| Depositing User: | Rachel Smith |
| Date Deposited: | 23 Mar 2011 12:48 |
| Last Modified: | 24 Sep 2024 09:09 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/27016 |
| DOI: | 10.1063/1.3408288 |
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