Please use this identifier to cite or link to this item:
http://dx.doi.org/10.25673/85816
Title: | The magic 4-cyanoresocinols : their role in the understanding of phenomena at the Rod-Banana cross-over and relations to twist-bend phases and other newly emerging LC phase types |
Author(s): | Tschierske, Carsten |
Issue Date: | 2022 |
Type: | Article |
Language: | English |
Abstract: | In this account, bent-core molecules involving the polar cyano-group are reviewed with a focus on the intensely investigated class of 4-cyanoresorcinol bisbenzoates. Cybotaxis and phase biaxiality of their nematic phases, the transition from nematic to smectic phases and the development of tilt and polar order in their smectic phases are discussed. Of special interest are heliconical (twist–bend) smectic intermediate phases occurring at the transition from paraelectric to antiferroelectric polar smectic phases if coinciding with the transition between anticlinic and synclinic tilt correlation. For some compounds, a reentrant polar SmA phase (SmALTPF) is observed below SmC and a silylated compound forms a new leaning-type phase. The formation of these achiral phases instead of the polar SmC phases involving layer chirality is discussed under the aspect of enantiophobic vs. enantiophilic organization. The effects of core structure and chain branching and, in addition, the effects of the intrinsic transient molecular, superstructural, and permanent molecular chirality on LC self-assembly are discussed. |
URI: | https://opendata.uni-halle.de//handle/1981185920/87768 http://dx.doi.org/10.25673/85816 |
Open Access: | Open access publication |
License: | (CC BY-NC-ND 4.0) Creative Commons Attribution NonCommercial NoDerivatives 4.0 |
Sponsor/Funder: | Publikationsfonds MLU |
Journal Title: | Liquid crystals |
Publisher: | Taylor and Francis |
Publisher Place: | London [u.a.] |
Original Publication: | 10.1080/02678292.2021.2010142 |
Appears in Collections: | Open Access Publikationen der MLU |
Files in This Item:
File | Description | Size | Format | |
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02678292.2021.pdf | 25.39 MB | Adobe PDF | View/Open |