Dielectric relaxation of dipropylsulfoxide

The complex dielectric permittivity of liquid dipropylsulfoxide (DPSO) has been measured at frequencies between 100 MHz and 20 GHz at four temperatures between 298.15 K and 328.15 K. The recorded spectra are well described by the Cole–Davidson spectral function, which presumes an unsymmetrical relax...

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Bibliographic Details
Published in:Journal of molecular liquids 2011-04, Vol.159 (3), p.201-203
Main Authors: Gabrielyan, L.S., Markarian, S.A., Weingärtner, H.
Format: Article
Language:English
Subjects:
Dielectric relaxation
Dipropylsulfoxide
Kirkwood correlation factor
Static dielectric constant
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Summary:The complex dielectric permittivity of liquid dipropylsulfoxide (DPSO) has been measured at frequencies between 100 MHz and 20 GHz at four temperatures between 298.15 K and 328.15 K. The recorded spectra are well described by the Cole–Davidson spectral function, which presumes an unsymmetrical relaxation time distribution. In addition to the spectral parameters of this relaxation time distribution we have calculated the Kirkwood correlation factor and the activation energy of molecular reorientation of DPSO. Comparison with recently published data for the lower homologues, dimethylsulfoxide and diethylsulfoxide, indicate that self-association in DPSO is stronger than in the lower homologues. ► The dielectric relaxation of liquid dipropylsulfoxide has been studied. ► The recorded spectra are well described by the Cole-Davidson spectral function. ► The Kirkwood correlation factor and the activation energy were calculated. ► Self-association in dipropylsulfoxide is stronger than in the lower homologues.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2011.01.007