Dielectric and Optical Studies of Homologous Series of Bicyclo[2,2,2]octane Derivatives with -NCS Terminal Group

• Authors: H. Herba , B. Żywucki , G. Czechowski , D. Bauman , A. Wąsik , J. Jadżyn
• Languages of publication: EN

Abstracts

EN

The static dielectric constants and the optical birefringence for four members of the homologous series of bicyclo[2,2,2]octane derivatives with -NCS terminal group (pentyl to octyl) have been measured as a function of temperature. From the dielectric anisotropy, the optical birefringence as well as the polarized absorption spectra of the dichroic dye dissolved in the liquid crystalline host the order parameter has been determined. The results obtained by using various experimental methods have been compared with those calculated from the Maier-Saupe mean field theory. It has been found that the order parameter for the successive homologues shows alternation similar to that exhibited for the nematic-isotropic transition temperature.

Keywords

EN

61.30.Gd; 77.22.Ch; 78.20.Fm

Discipline

• 78.20.Fm: Birefringence
• 61.30.Gd: Orientational order of liquid crystals; electric and magnetic field effects on order
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 87
• Issue: 6
• Pages: 985-994

Dates

published

1995-06

received

1995-01-24

Contributors

author

H. Herba

• Department of Physics, University of Technology, W. Pola 2, 35-969 Rzeszów, Poland

author

B. Żywucki

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

G. Czechowski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

D. Bauman

• Institute of Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland

author

A. Wąsik

• Institute of Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland

author

J. Jadżyn

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

Identifiers

DOI

10.12693/APhysPolA.87.985