Separation of two main dielectric relaxation processes in the nematic and isotropic phase of 6BAP(F) (1-[4-(hexylbicyclo[2,2,2]octyl]-2-(3-fluoro-4-methoxyphenyl)ethane)

Stanislaw Urban; B. Gestblom; Roman S. Dabrowski

doi:10.1117/12.299971

1 February 1998 Separation of two main dielectric relaxation processes in the nematic and isotropic phase of 6BAP(F) (1-[4-(hexylbicyclo[2,2,2]octyl]-2-(3-fluoro-4- methoxyphenyl)ethane)

Stanislaw Urban, B. Gestblom, Roman S. Dabrowski

Author Affiliations +

Proceedings Volume 3318, Liquid Crystals: Physics, Technology, and Applications; (1998) https://doi.org/10.1117/12.299971
Event: Liquid Crystals, 1997, Zakopane, Poland

Abstract

The results of dielectric studies of 6BAP(F) in the nematic and isotropic phases are presented. The substance has a negative dielectric anisotropy. The use of two experimental techniques, network analyzer and time domain spectroscopy, allowed to separate of two main relaxation processes: one connected with the molecular reorientations around the short axes and the second with rotations about the long axes, in the nematic as well as in the isotropic phases of 6BAP(F). The relaxation times and activation enthalpies for particular motions were obtained. The retardation factors characterizing the influence of the nematic order on both reorientations were calculated.

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Stanislaw Urban, B. Gestblom, and Roman S. Dabrowski "Separation of two main dielectric relaxation processes in the nematic and isotropic phase of 6BAP(F) (1-[4-(hexylbicyclo[2,2,2]octyl]-2-(3-fluoro-4- methoxyphenyl)ethane)", Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); https://doi.org/10.1117/12.299971

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