In situ polymerization of liquid-crystalline thin films of electron-transporting perylene tetracarboxylic bisimide bearing cyclotetrasiloxane rings
In situ polymerization of liquid-crystalline thin films of electron-transporting perylene tetracarboxylic bisimide bearing cyclotetrasiloxane rings
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DOI：
10.1039/c5ra23518a
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Funahashi, Masahiro
中科院分区：
文献类型：
--
作者：
Takenami, Kaede;Uemura, Shinobu;Funahashi, Masahiro
制备了一种带有四个环四硅氧烷环的二萘嵌苯四羧酸双酰亚胺（PTCBI）衍生物，尽管存在体积庞大的环四硅氧烷环，但该衍生物在室温下形成柱状相。在室温下，该PTCBI衍生物的柱相中的电子迁移率为0.12 cm（2）V-1 s（-1），这与分子晶体的电子迁移率相当。PTCBI衍生物可溶于各种有机溶剂中，并且通过旋涂方法成功地制备了液晶薄膜。旋涂膜在暴露于三氟甲磺酸蒸气时不溶解。在聚合过程中，LC相中的柱状结构得以保留。采用摩擦转移法制备了宏观取向的液晶薄膜，并在聚合后保留了光学各向异性。
A perylene tetracarboxylic bisimide (PTCBI) derivative bearing four cyclotetrasiloxane rings that forms a columnar phase at room temperature despite the presence of the bulky cyclotetrasiloxane rings was prepared. The electron mobility in the columnar phase of this PTCBI derivative at room temperature is 0.12 cm(2) V-1 s(-1), which is comparable to those of molecular crystals. The PTCBI derivative is soluble in various organic solvents and liquid crystalline thin films were successfully produced by a spin-coating method. The spin-coated films were insolubilized upon exposure to trifluoromethanesulfonic acid vapor. The columnar structure in the LC phase was retained during polymerization. Using a friction transfer method, macroscopically aligned LC thin films were produced and the optical anisotropy was retained after polymerization.