Fullerene-Filled Liquid-Crystal Stars: A Supramolecular Click Mechanism for the Generation of Tailored Donor-Acceptor Assemblies.
Fullerene-Filled Liquid-Crystal Stars: A Supramolecular Click Mechanism for the Generation of Tailored Donor-Acceptor Assemblies.
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DOI：
10.1002/anie.201812465
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发表时间：
2019-03
影响因子：
--
通讯作者：
M. Lehmann;M. Dechant;M. Holzapfel;A. Schmiedel;C. Lambert
中科院分区：
文献类型：
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作者：
M. Lehmann;M. Dechant;M. Holzapfel;A. Schmiedel;C. Lambert
成功地合成了两种形状持久的具有低聚(亚苯乙撑)臂和酞菁核的星形介孔分子--一个提供自由空间(2)，另一个由通过间隔物(3)连接的四个富勒烯空间位阻。与较小的盘状衍生物1相比，介元2形成的是柱状液晶(LC)，它只能在没有π堆积的情况下部分取向，而3不是LC。例外的是，2和3的1：1混合物通过前所未有的点击过程形成了可排列的柱状LC，具有强烈的π堆积和四螺旋结构的富勒烯，类似于球制动机构。C60单元还连接不同的柱子。这是由纳米分离和富勒烯填充空隙所驱动的。光物理研究证实，存在一种在溶液和固体中产生电荷分离态的光收集系统，这使得这种高度有序的材料对未来光伏器件的研究具有吸引力。
Two shape-persistent star mesogens with oligo(phenylene ethenylene) arms and a phthalocyanine core-one providing free space (2) and one sterically encumbered by four fullerenes attached through spacers (3)-have been successfully synthesized. In contrast to the smaller discotic derivative 1, mesogen 2 forms a columnar liquid crystal (LC), which can only be partially aligned without π-stacking, while 3 is not an LC. Exceptionally, the 1:1 mixture of 2 and 3 forms an alignable columnar LC with strong π-stacking and quadruply helically organized fullerenes by an unprecedented click process that is similar to a ball detent mechanism. The C60 units also interconnect different columns. This is driven by nanosegregation and space-filling of the voids with fullerenes. Photophysical studies confirm the presence of a light-collecting system that generates charge-separated states in solution and in the solid state, which makes such highly organized materials attractive for the study of future photovoltaic devices.