π‐Conjugated Oligothiophene‐Based Polycatenar Liquid Crystals: Self‐Organization and Photoconductive, Luminescent, and Redox Properties
π‐Conjugated Oligothiophene‐Based Polycatenar Liquid Crystals: Self‐Organization and Photoconductive, Luminescent, and Redox Properties
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DOI：
10.1002/adfm.200801268
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发表时间：
2009-02
影响因子：
19
通讯作者：
Takuma Yasuda;H. Ooi;J. Morita;Yusuke Akama;K. Minoura;M. Funahashi;T. Shimomura;Takashi Kato
中科院分区：
文献类型：
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作者：
Takuma Yasuda;H. Ooi;J. Morita;Yusuke Akama;K. Minoura;M. Funahashi;T. Shimomura;Takashi Kato
设计并合成了一系列末端带有三个或两个烷氧基链的液晶（LC）π-共轭低聚噻吩。这些多链寡聚噻吩形成各种LC纳米结构，包括近晶相、柱状相和胶束立方相。这些性质取决于末端烷氧基链的数量和长度。测量了低聚噻吩的空穴迁移率。层状近晶和柱状结构能够传输空穴，导致高达0.01 cm 2 V−1 s−1的迁移率。还已经探索了柱状LC组件以产生线性偏振光发射。从寡聚噻吩的单轴取向膜观察到精细的红色偏振荧光。的氧化还原性质的低聚噻吩在溶液中和在薄膜中进行了研究。低聚噻吩在施加氧化电位时表现出电致变色。本设计策略可用于制备各种功能性电活性分子组装体。
A series of liquid‐crystalline (LC) π‐‐conjugated oligothiophenes bearing three or two alkoxy chains at their extremities has been designed and synthesized. These polycatenar oligothiophenes form various LC nanostructures including smectic, columnar, and micellar cubic phases. These properties depend on the number and length of the terminal alkoxy chains. The hole mobilities for the oligothiophenes have been measured. The layered smectic and columnar structures are capable of transporting holes, leading to mobilities of up to 0.01 cm2 V−1 s−1. The columnar LC assemblies have also been explored to produce linearly polarized light‐emission. Fine red polarized fluorescence is observed from a uniaxially aligned film of the oligothiophenes. The redox properties of the oligothiophenes both in solutions and in films have been examined. The oligothiophenes exhibit electrochromism upon applying an oxidative potential. The present design strategy is useful for fabricating a variety of functional electro‐active molecular assemblies.