Correlation Between Side‐Chain Arrangement and Main‐Chain Helix Conformation in Liquid Crystalline Syndiotactic Poly(Substituted Methylene)s Bearing Cyanobiphenyl Mesogens

Author:

Kiyoura Masamichi1ORCID,Koshimizu Noboru1,Shikinaka Kazuhiro2ORCID,Shigehara Kiyotaka2,Tokita Masatoshi1ORCID

Affiliation:

1. Department of Chemical Science and Engineering Tokyo Institute of Technology Ookayama Meguro Tokyo 152‐8550 Japan

2. Graduate School of Engineering Tokyo University of Agriculture and Technology Naka‐cho Koganei Tokyo 184‐8588 Japan

Abstract

AbstractThis study focuses on the helical conformation of the main chain of syndiotactic poly(substituted methylene)s with 4‐cyanobiphenyl (CB) moieties incorporated at the ends of the alkyloxycarbonyl side chains. The polymers are designated as PCBn, where n is the number of methylene units in the spacer between the main chain and CB. PCB6 and PCB8 assemble the side chains into layers without positional order within the layers. Meanwhile, PCB10 and PCB12 assemble the side chains into layers with a short‐range positional order. Each CB moiety at a side chain end is bonded to a carbon atom, which is arranged along the helical main chain contour, and its position correlates with that of the carbon atom. As the temperature increases, PCB10 undergoes a phase transition, losing the positional order of the side chains within a layer, which alters the main chain conformation. Consequently, the positions of the side‐chain CB moieties affect the helical conformation of the main chain. In contrast, PCB12 maintains the main chain conformation when undergoing a phase transition similar to that of PCB10. PCB12 with the longer spacer allows the main chain to adopt a helix conformation, which is independent of the positions of side‐chain CB moieties.

Funder

Japan Society for the Promotion of Science

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3