Phase Behavior and Dynamics of the Liquid Crystal 4'-butyl-4-(2-methylbutoxy)azoxybenzene (4ABO5*)

E Juszyńska-Gałązka; M Gałązka; M Massalska-Arodź; A Bąk; K Chłędowska; W Tomczyk

doi:10.1021/jp510584w

Phase Behavior and Dynamics of the Liquid Crystal 4'-butyl-4-(2-methylbutoxy)azoxybenzene (4ABO5*)

J Phys Chem B. 2014 Dec 26;118(51):14982-9. doi: 10.1021/jp510584w. Epub 2014 Dec 12.

Authors

E Juszyńska-Gałązka¹, M Gałązka¹, M Massalska-Arodź¹, A Bąk², K Chłędowska², W Tomczyk³

Affiliations

¹ The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences , E. Radzikowskiego 152 , 31-342 Kraków, Poland.
² The Faculty of Mathematics and Applied Physics, Rzeszów University of Technology , Powstańców Warszawy 6 , 35-959 Rzeszów, Poland.
³ Institute of Physics, Jagiellonian University , W.S. Reymonta 4 , 30-059 Kraków, Poland.

PMID: 25429851
DOI: 10.1021/jp510584w

Abstract

The results of dielectric relaxation spectroscopy and polarizing microscope observation of the 4'-butyl-4-(2-methylbutoxy)azoxybenzene (abbreviated as 4ABO5*) are presented. Numerical analysis of the dielectric spectra results points to complex dynamics of 4ABO5* molecules in isotropic, cholesteric, and crystalline phases. Two well-separated maxima on the imaginary part of dielectric permittivity and the third low frequency relaxation process, hidden in the conductivity region, were detected and described in cholesteric and crystalline phases. Temperature dependence of mean relaxation times characterizing flip-flop motions and rotation around long axes, observed in all phases, is of the Arrhenius type.