Liquid crystals from shape-persistent porphyrin stars with intrinsic free space
Liquid crystals from shape-persistent porphyrin stars with intrinsic free space
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DOI：
10.1039/c9tc07086a
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发表时间：
2020-04-28
影响因子：
6.4
通讯作者：
Lehmann, Matthias
中科院分区：
文献类型：
--
作者：
Ghosh, Tapas;Gerbig, Lisa;Lehmann, Matthias
成功合成了一个小的形状持久的，共轭的星形液晶（LC）与锌卟啉核库。不同的共轭臂连接在中间位置。由于空间填充的要求，自组装处于液晶和软晶相之间的极限。一个模型表明形成双螺旋二聚体。一个显着的介晶与噻吩直接连接到卟啉核心产生J-聚集体在溶液中，它坚持在固态。在液晶中，J-聚集体消失，但可以通过溶剂处理可逆地重新获得。
A small library of shape-persistent, conjugated star-shaped liquid crystals (LCs) with a zinc porphyrin core was successfully synthesized. Different conjugated arms are attached in themeso-positions. The self-assembly is at the limit between liquid crystals and soft crystal phases owing to the space-filling requirement. A model indicates the formation of dimers in double helices. A remarkable mesogen with thiophene linked directly to the porphyrin core generates J-aggregates in solution, which persist in the solid state. In the liquid crystal the J-aggregates disappear but can be reversibly reobtained by solvent treatment.