Issue 19, 2023

Conformationally supramolecular chirality prevails over configurational point chirality in side-chain liquid crystalline polymers

Abstract

In nature, the communication of primary amino acids in the polypeptides influences molecular-level packing, supramolecular chirality, and the resulting protein structures. In chiral side-chain liquid crystalline polymers (SCLCPs), however, the hierarchical chiral communication between supramolecular mesogens is still determined by the parent chiral source due to the intermolecular interactions. Herein, we present a novel strategy to enable the tunable chiral-to-chiral communication in azobenzene (Azo) SCLCPs, in which the chiroptical properties are not dominated by the configurational point chirality but by the conformationally supramolecular chirality that emerged. The communication of dyads biases supramolecular chirality with multiple packing preference, thereby overruling the configurational chirality of the stereocenter. The chiral communication mechanism between the side-chain mesogens is revealed through the systematic study of the chiral arrangement at the molecular level, including mesomorphic properties, stacking modes, chiroptical dynamics and further morphological dimensions.

Graphical abstract: Conformationally supramolecular chirality prevails over configurational point chirality in side-chain liquid crystalline polymers

Supplementary files

Article information

Article type
Edge Article
Submitted
21 2 2023
Accepted
16 4 2023
First published
18 4 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2023,14, 5116-5124

Conformationally supramolecular chirality prevails over configurational point chirality in side-chain liquid crystalline polymers

X. Cheng, Y. Gan, G. Zhang, Q. Song, Z. Zhang and W. Zhang, Chem. Sci., 2023, 14, 5116 DOI: 10.1039/D3SC00975K

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