Share Email Print
cover

Proceedings Paper

Dielectric characterization of different homologous compounds forming smectic B phases
Author(s): Heiko Schmalfuss; Horst Kresse
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The first seven members of homologous N-(4-n- hexyloxybenzylidene)-4-n-alkylanilines were synthesized, purified and characterized by calorimetric and dielectric measurements during cooling. There are phase transitions between high temperature phases (nematic, smectic A) and the solid-like smectic modifications B and G characterized by different transition entropies and different steps for the relaxation times which can be related to each other. Furthermore a change of sign of the dielectric anisotropy with increasing number of carbon atoms in the alkyl chain was detected. There is also a strong dependence of the activation energies for the reorientation about the short molecular axis on the temperature range of the nematic phase.

Paper Details

Date Published: 12 May 2000
PDF: 5 pages
Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); doi: 10.1117/12.385687
Show Author Affiliations
Heiko Schmalfuss, Martin-Luther-Univ. Halle-Wittenberg (Germany)
Horst Kresse, Martin-Luther-Univ. Halle-Wittenberg (Germany)


Published in SPIE Proceedings Vol. 4147:
Liquid Crystals: Chemistry, Physics, and Applications
Stanislaw J. Klosowicz; Jolanta Rutkowska; Jerzy Zielinski; Jozef Zmija, Editor(s)

© SPIE. Terms of Use
Back to Top