Synthesis and properties of fluorinated terphenyl liquid crystals utilizing 5,6-dihydro-4H-cyclopenta[b]thiophene as core unit
作者:Danyang Wan、Zhaoyi Che、Lingchao Mo、Minggang Hu、Juanli Li、Fengjiao Shi、Zhongwei An、Jian Li
DOI:10.1016/j.molstruc.2022.133612
日期:2022.11
5,6-dihydro-4H-cyclopenta[b]thiophene was incorporated to fluorinated terphenyl and six novel liquid crystals were designed and synthesized by Suzuki coupling reactions in high yields. These mesogens possessed wide smectic A or nematic phase ranges, which proved the usefulness of this core in the formation of liquid crystal phase as 1,4-disubstituted phenylene-based reference compound have no mesomorphic
5,6-dihydro-4 H - cyclopenta[ b]噻吩被掺入到氟化三联苯中,并通过 Suzuki 偶联反应以高产率设计和合成了六种新型液晶。这些介晶具有宽的近晶A或向列相范围,这证明了该核在形成液晶相中的有用性,因为1,4-二取代亚苯基基参考化合物没有介晶相。此外,液晶的双折射和介电各向异性值也增加了,使该核心成为修饰三联苯型液晶元的实用候选者。然后使用密度泛函理论计算,并通过比较实验和计算的吸收光谱来确保其可靠性。引入该核心单元后,计算的介晶长宽比得到改善,这可能会促进介晶相的形成。两个代表性介晶的极化率和偶极矩的计算顺序及其参考分别与它们的双折射和介电各向异性值的顺序一致,提供了微观分子结构和宏观物理性质之间的一些关系信息。