南京邮电大学黄维团队研究了由二芴醇对映体组装而成的超分子非螺旋通道和微管。该研究成果于2020年11月13日发表在《德国应用化学》。

由于光电活性分子通道结构在电荷迁移率、光诱导电子转移、质子传导和激子传输等方面具有独特的优势，因此设计和组装光电活性分子通道结构具有重要的意义。

除了宏循环叠加和结+连接，该研究率先为基于一对镜像异构体的一维通道的精细设计提供新的策略。外消旋9,9'-二苯基[2,2'-二芴]-9,9'-二醇（DPFOH）对映体被证明是一种新型的非螺旋一维通道结构的构建模块。虽然单个分子不具有任何分子对称性，但两对外消旋DPFOH对映体可以通过立体人字形组装形成C2对称的闭环。由于对映体对的特殊对称性、多重超分子相互作用和溶剂分子的填充作用，这种传统的不稳定拓扑结构得以实现。同时，解释了管状结构从分子水平到微观尺度的自相似关系。

最后，对锂离子的输运性能进行了验证，其离子电导率为1.77×10-4S/cm，表明这种新型一维通道结构具有潜在的研究价值。

附：英文原文

Title: Supramolecular Non‐helical One‐dimensional Channels and Microtubes Assembled from Enantiomers of Difluorenol

Author: Sha-Sha Wang, Yi-Ran Liu, Xiang Yu, Yang Zhou, Tao-Tao Zhong, Yue-Tian Li, Ling-Hai Xie, Wei Huang

Issue&Volume: 13 November 2020

Abstract: The design and assembly of photoelectro‐active molecular channel structures is of great importance because of their special advantages in charge mobility, photo‐induced electron transfer, proton conduction and exciton transport. Besides macrocycle stacking and knot + linker connection, this work rarely provides a fresh strategy for the exquisite design of 1D channel based on a pair of mirror isomers. Racemic 9,9'‐diphenyl‐[2,2'‐bifluorene]‐9,9'‐diol (DPFOH) enantiomers were proved to be utilized as newfashioned building modules for the non‐helical 1D channel structures. Although the individual molecule doesn’t present any molecular symmetry, two pairs of racemic DPFOH enantiomers can form a C2‐symmetric closed loop via the stereoscopic herringbone assembly. Thanks to the special symmetry derived from the enantiomer pairs, the multiple supramolecular interactions and the padding from solvent molecules, this conventionally unstable topological structure is achieved. The self‐similar relationship of tubular structures spanning from molecular level to microscale level was explained. Finally, the lithium‐ion transport performance was demonstrated, showing a significant ion conductivity of 1.77×10‐4 S/cm, indicating the potential research value of this novel 1D channel structure.

DOI: 10.1002/anie.202012548

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202012548