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Liquid crystals from shape-persistent porphyrin stars with intrinsic free space

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Abstract

A small library of shape-persistent, conjugated star-shaped liquid crystals (LCs) with a zinc porphyrin core was successfully synthesized. Different conjugated arms are attached in the meso-positions. The self-assembly is at the limit between liquid crystals and soft crystal phases owing to the space-filling requirement. A model indicates the formation of dimers in double helices. A remarkable mesogen with thiophene linked directly to the porphyrin core generates J-aggregates in solution, which persist in the solid state. In the liquid crystal the J-aggregates disappear but can be reversibly reobtained by solvent treatment.

Graphical abstract: Liquid crystals from shape-persistent porphyrin stars with intrinsic free space

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Article information


Submitted
29 Dec 2019
Accepted
18 Mar 2020
First published
19 Mar 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Liquid crystals from shape-persistent porphyrin stars with intrinsic free space

T. Ghosh, L. Gerbig, M. Lambov, M. Dechant and M. Lehmann, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC07086A

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