Chirality and Macroscopic Polar Order in a Ferroelectric Smectic Liquid-Crystalline Phase Formed by Achiral Polyphilic Bent-Core Molecules†
Gert Dantlgraber
Institute of Organic Chemistry Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Strasse 2, 06120 Halle (Germany) Fax: (+49) 345-55-27223
Search for more papers by this authorAlexei Eremin
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorSiegmar Diele Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorAnton Hauser Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorHorst Kresse Prof. Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorGerhard Pelzl Prof. Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorCarsten Tschierske Prof. Dr.
Institute of Organic Chemistry Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Strasse 2, 06120 Halle (Germany) Fax: (+49) 345-55-27223
Search for more papers by this authorGert Dantlgraber
Institute of Organic Chemistry Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Strasse 2, 06120 Halle (Germany) Fax: (+49) 345-55-27223
Search for more papers by this authorAlexei Eremin
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorSiegmar Diele Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorAnton Hauser Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorHorst Kresse Prof. Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorGerhard Pelzl Prof. Dr.
Institute of Physical Chemistry Martin-Luther-University Halle-Wittenberg
Search for more papers by this authorCarsten Tschierske Prof. Dr.
Institute of Organic Chemistry Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Strasse 2, 06120 Halle (Germany) Fax: (+49) 345-55-27223
Search for more papers by this authorThis work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie.
Graphical Abstract
Nicht chiral und doch ferroelektrisch: Bei konventionellen fluiden Systemen heben sich die Dipolmomente der einzelnen Moleküle gegenseitig auf, und eine makroskopisch apolare Struktur entsteht. Hier wird gezeigt, wie sich durch gezieltes Moleküldesign und Nutzung von Mikrosegregationseffekten die Selbstorganisation von Molekülen wie 1 so steuern lässt, dass eine fluide Schichtstruktur mit makroskopisch polarer Ordnung entstehen kann.
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- 22 Two distinct enantiomeric configurations, which differ in the tilt-direction and the direction of the polar axes of the molecules in the smectic layers (+/+ and −/−), are possible for the SmCSPF state.[7] They occur in different regions within the sample, in which the extinction crosses rotate either clockwise or anticlockwise.
- 23 Quite similarly, decreasing the temperature reduces the out-of-layer fluctuations and could lead to a transition from an AF to FE order as recently shown for a B5-phase.[11]
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