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Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Editor-in-Chief: Holthaus, Martin

Editorial Board: Fetecau, Corina / Kiefer, Claus


IMPACT FACTOR 2016: 1.432

CiteScore 2017: 1.30

SCImago Journal Rank (SJR) 2017: 0.403
Source Normalized Impact per Paper (SNIP) 2017: 0.632

Online
ISSN
1865-7109
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Volume 31, Issue 12

Issues

Untersuchung der elektrischen Leitfähigkeit homologer N-(4-n-Alkyloxybenzyliden)-4'-n-butylaniline im nematischen und smektischen Phasenbereich / Investigation of the Electrical Conductivity of Homologous N-(4-n-alkoxybenzylidene)-4'-nbutylanilines in the Nematic and Smectic Phases

G. Heppke
  • Institut für Anorganische und Analytische Chemie der Technischen Universität Berlin und Lehrstuhl für Physikalische Chemie der Gesamthochschule Siegen
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/ F. Schneider
  • Institut für Anorganische und Analytische Chemie der Technischen Universität Berlin und Lehrstuhl für Physikalische Chemie der Gesamthochschule Siegen
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ A. Sterzl
  • Institut für Anorganische und Analytische Chemie der Technischen Universität Berlin und Lehrstuhl für Physikalische Chemie der Gesamthochschule Siegen
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/zna-1976-1238

Abstract

Investigation The electrical conductivity of the first eight homologous N-(4-n-alkoxybenzylidene)-4'-n-butylanilines is investigated in the isotropic, nematic and smectic phases using the electrolyte tetra-butylammonium picrate. The anisotropy ratio of the electrical conductivity shows pretransition behaviour in the nematic phases close to the transition to the smectic phases. This behaviour be-comes more distinct with increasing alkyl chain length of the liquid crystals. In the nematic phase of 40·4 an anisotropy ratio of V = 0.55 is determined at the lowest electrolyte concentration. Values of about V=0.05 were found in the smectic phases of several homologues. In the nematic phase, an increase of the electrolyte concentration effects an increase of the anisotropy ratio. This effect is systematically enhanced with increasing alkyl chain length.

About the article

Received: 1976-10-27

Published Online: 2014-06-02

Published in Print: 1976-12-01


Citation Information: Zeitschrift für Naturforschung A, Volume 31, Issue 12, Pages 1700–1706, ISSN (Online) 1865-7109, ISSN (Print) 0932-0784, DOI: https://doi.org/10.1515/zna-1976-1238.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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