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Open AccessReview

The Lyotropic Analog of the Polar SmC* Phase

Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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Authors to whom correspondence should be addressed.
Crystals 2019, 9(11), 568; https://doi.org/10.3390/cryst9110568
Received: 10 October 2019 / Revised: 24 October 2019 / Accepted: 25 October 2019 / Published: 29 October 2019
(This article belongs to the Special Issue New Trends in Lyotropic Liquid Crystals)
Only six years ago, the first clear-cut example of a ferroelectric, lyotropic liquid crystal was discovered. Since then, ongoing investigations in this new research field provided numerous instances of the missing pieces to complete the formerly blank picture of the lyotropic smectic C* (SmC*) phase. In this review we wanted to combine these new results and put them into a wider historical and scientific context. We start by giving an introduction about characteristic features of the well-known thermotropic SmC* phase and why it is so difficult to find a lyotropic equivalent of this fascinating phase. After discussing early examples of achiral lyotropic and swollen SmC phases, we recap the discovery of the first lyotropic SmC* phase. The molecular features necessary for its formation and its properties are analyzed. We place special emphasis on discussing the long-range orientational order of the tilt direction and the corresponding chirality effects. By comparing these exceptional features with thermotropic and swollen SmC* phases, we aim to improve not only the understanding of the lyotropic SmC* phase, but also of the relationship between thermotropic and lyotropic systems in general. View Full-Text
Keywords: lyotropic liquid crystals; SmC* phase; chirality; ferroelectricity; hydrogen bonds; hydration forces lyotropic liquid crystals; SmC* phase; chirality; ferroelectricity; hydrogen bonds; hydration forces
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MDPI and ACS Style

Bruckner, J.R.; Giesselmann, F. The Lyotropic Analog of the Polar SmC* Phase. Crystals 2019, 9, 568. https://doi.org/10.3390/cryst9110568

AMA Style

Bruckner JR, Giesselmann F. The Lyotropic Analog of the Polar SmC* Phase. Crystals. 2019; 9(11):568. https://doi.org/10.3390/cryst9110568

Chicago/Turabian Style

Bruckner, Johanna R.; Giesselmann, Frank. 2019. "The Lyotropic Analog of the Polar SmC* Phase" Crystals 9, no. 11: 568. https://doi.org/10.3390/cryst9110568

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