A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates
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- 作者：Stefanie Herbst ; Dr. Bartolome Soberats ; Dr. Pawaret Leowanawat ; Prof. Dr. Matthias Lehmann and Prof. Dr. Frank Wü ; rthner
- 刊名：Angewandte Chemie International Edition
- 出版年：2017
- 出版时间：February 13, 2017
- 年：2017
- 卷：56
- 期：8
- 页码：2162-2165
- 全文大小：2677K
- ISSN：1521-3773
文摘
A new perylene bisimide (PBI) dye self-assembles through hydrogen bonds and π–π interactions into J-aggregates that in turn self-organize into liquid-crystalline (LC) columnar hexagonal domains. The PBI cores are organized with the transition dipole moments parallel to the columnar axis, which is an unprecedented structural organization in π-conjugated columnar liquid crystals. Middle and wide-angle X-ray analyses reveal a helical structure consisting of three self-assembled hydrogen-bonded PBI strands that constitute a single column of the columnar hexagonal phase. This remarkable assembly mode for columnar liquid crystals may afford new anisotropic LC materials for applications in photonics.