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Main Title: Nachweis der re-entrant nematischen Phase an verschiedenen homologen biaromatischen Flüssigkristallen durch Untersuchung binärer Mischsysteme
Translated Title: Re-entrant Nematic Phase Established for Several Homologous Biaromatic Liquid Crystals by Investigation of Binary Mixed Systems
Author(s): Göbl-Wunsch, A.
Heppke, G.
Hopf, R.
Type: Article
Language Code: de
Abstract: Several homologous series of biaromatic liquid crystals with structure type CnH2n+1O • C6H4 • M•C6H4-CN are investigated. By studying the phase transition temperatures in binary mixed systems a "re-entrant" nematic phase N(re) is established for all compounds exhibiting smectic A phases. The virtual transition temperatures N(re) - SA are found to decrease with increasing chain length of the alkyloxy group. The influence of the middle group M on the re-entrant behaviour can be attributed mainly to its dipole moment. The temperature range of the smectic A phase decreases when the middle group dipole moment is additive to that of the nitrile group. To summarize it can be said that the "re-entrant" behaviour of biaromatic liquid crystals is found to be very similar to that of triaromatic systems reported recently.
Issue Date: 1981
Date Available: 4-Jan-2019
DDC Class: 500 Naturwissenschaften und Mathematik
Subject(s): nematic phase
homologous biaromatic liquid crystals
Journal Title: Zeitschrift für Naturforschung A
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 36
Issue: 3
Publisher DOI: 10.1515/zna-1981-0303
Page Start: 213
Page End: 221
EISSN: 1865-7109
ISSN: 0932-0784
Appears in Collections:FG Anorganische Chemie - Festkörper- und Materialchemie » Publications

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