Self-Inductive Asymmetric Synthesis of Polyisocyanides in Liquid Crystal
Self-Inductive Asymmetric Synthesis of Polyisocyanides in Liquid Crystal
复制标题
液晶中多异氰化物的自感应不对称合成
DOI：
10.1021/acs.macromol.2c02490
复制
发表时间：
2023
期刊：
影响因子：
5.5
通讯作者：
Hiromasa Goto
中科院分区：
文献类型：
--
作者：
Takuya Yonehara;Shigeki Nimori;Reiji Kumai;Hiromasa Goto
单体在其强化的环境中快速生长。本研究提出了光学活性聚异氰酸酯的合成在一个液晶（CLC）反应场本身诱导和评价所得聚合物的液晶性和磁性取向。在手性液晶反应场中进行手性异腈单体的聚合。通过添加少量的手性苯基异腈，制备了在偏光显微镜观察下显示指纹状图像的手性液晶反应场，所述手性苯基异腈具有用于从手性液晶形成CLC的单体和手性诱导剂功能。异腈单体在自身手性诱导制备的手性液晶反应场中进行聚合，得到了具有单手螺旋结构的聚苯异腈（PPI）。CLC中手性单体的不对称聚合放大了所得聚合物的光学活性。由此制备的聚合物显示出液晶性。此外，实现了聚（苯基异腈）在溶剂蒸气环境中的磁性取向。同步辐射X射线分析评价了PPI的单轴取向。
Monomers grow by leaps and bounds in their enhanced environment. This study presents the synthesis of optically active polyisocyanides in a cholesteric liquid crystal (CLC) reaction field induced by itself and evaluates the liquid crystallinity of the resultant polymer and the magnetic orientation. Polymerization of a chiral isocyanide monomer in a chiral liquid crystal reaction field was performed. The chiral liquid crystal reaction field showing a fingerprint-like image under polarizing optical microscopy observations was prepared by adding a small amount of the chiral phenyl isocyanide with both monomer and chiral inducer functions for the formation of CLC from a nematic liquid crystal. Polymerization of the isocyanide monomer in the chiral liquid crystal reaction field prepared via chiral induction by itself produced poly(phenyl isocyanide) (PPI) with a one-handed helical structure. The asymmetric polymerization of the chiral monomer in CLC amplifies optical activity for the resultant polymer. The polymer thus prepared shows liquid crystallinity. Further, a magnetic orientation in the solvent vapor environment of the poly(phenyl isocyanides) was achieved. Synchrotron X-ray analysis evaluated the uniaxial orientation of PPI.
利用螺旋聚合中的路径控制从单一手性单体选择性合成左手和右手超分子螺旋
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
Jiheong Kang;宮島大吾;相田卓三
通讯作者：
相田卓三
影响因子：
16.6
作者：
Wang, Chao;Xu, Lei;Wu, Zong-Quan
通讯作者：
Wu, Zong-Quan