非手性聚合物体系中超分子手性的存储及自修复  

Chiral Storage and Self-recovery of Supramolecular Chirality in an Achiral Polymer System

作　　者：刘鸣华[1] Ming-hua Liu(Institute of Chemistry,Chinese Academy of Sciences,Beijing 100084)

机构地区：[1]中国科学院化学研究所,北京100190

出　　处：《高分子学报》2021年第11期1421-1423,共3页Acta Polymerica Sinica

摘　　要：从非手性组装基元出发构建超分子手性材料一直是手性研究领域的一个挑战性课题,其不仅可以避免复杂的合成步骤与使用昂贵的手性原料,而且可以从本质上理解手性材料中手性的起源究竟是什么.一般的手性诱导均依赖于非共价键相互作用作为手性传递的媒介,但这一弱相互作用很容易受到外界环境例如温度、光照以及溶剂的影响从而导致手性组装结构被破坏.近日,苏州大学张伟等在非手性侧链型液晶聚合物体系中,结合手性诱导与共价键交联的方式实现了超分子手性的长久记忆,并且这一有序结构仍可对外界条件的改变做出响应.即使手性被短暂擦除,其也可依赖存储于共价交联网络中的手性信息实现手性自修复(chiral self-recovery).这一工作有望为未来多功能手性材料的设计提供新的思路.The construction of supramolecular chiral materials from achiral building-units has always been a challenging topic in the field of chiral research.It can not only avoid tedious synthesis steps and the use of expensive chiral raw materials,but also provide the understanding of the origin of chirality in chiral materials.Traditionally,it is non-covalent bonds that often act as the“bridge”between the building blocks and chiral superstructure.However,the chiral ordered structures formed by these weak interactions are often easily destroyed by outer stimulus,such as light,heat or solvent,which is completely irreversible without the pre-chiral source.Recently,Wei Zhang and co-workers at Soochow University reported the permanent memory of chirality in achiral polymer system,by combining chiral induction and covalent cross-linking strategy.Interestingly,the stored chiral information in cross-linked structure can trigger the perfect chiral self-recovery(CSR)behaviors after being destroyed by UV light,heat and solvent.This results will pave a new way for producing novel chiroptical materials with reversible chirality from achiral sources.

关 键 词：超分子手性 手性诱导 手性存储 手性自修复 

分 类 号：O641.3[理学—物理化学]