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Science 7 January 2005:
Vol. 307. no. 5706, pp. 96 - 99
DOI: 10.1126/science.1105612

Reports

Liquid Crystalline Networks Composed of Pentagonal, Square, and Triangular Cylinders

Bin Chen,1 Xiangbing Zeng,3 Ute Baumeister,2 Goran Ungar,3 Carsten Tschierske1*

T-shaped molecules are designed in such a way that they self-organize into nanoscale liquid crystalline honeycombs based on polygons with any chosen number of sides. One of the phases reported here is a periodic organization of identical pentagonal cylinders; the other one is a structure composed of square-shaped and triangular cylinders in the ratio 2:1. These two different packing motifs represent duals of the same topological class. The generalization of the concept applied here allows the prediction of a whole range of unusual complex liquid crystalline phases.

1 Institute of Organic Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany.
2 Institute of Physical Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, D-06120 Halle, Germany.
3 Department of Engineering Materials and Centre for Molecular Materials, University of Sheffield, Sheffield S1 3JD, UK.

* To whom correspondence should be addressed. E-mail: carsten.tschierske{at}chemie.uni-halle.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)