A calamitic mesogenic near-infrared absorbing croconaine dye/liquid crystalline elastomer composite

Chemical Science
Ling-Xiang GuoHong Yang

Abstract

In this work, we report the first example of a calamitic mesogenic near-infrared (NIR) absorbing organic dye, made by functionalizing a thiophene-croconaine chromophore rigid core with two symmetric long flexible alkyl chains. The liquid crystal (LC) NIR dye YHD796 exhibits a sharp and intense NIR absorption band with a maximum absorption peak at 796 nm. Taking advantage of the improved solubility of YHD796 dispersed in mesogenic molecules, a homogeneously-aligned mono-domain liquid crystalline elastomer (LCE)/YHD796 composite film is successfully prepared by applying the classical LC-cell-alignment method and in situ photo-polymerization of photocurable LC monomer mixtures. This LCE/YHD796 composite film performs a fully reversible contraction/expansion response towards NIR light stimulus due to the photo-thermal heating effect induced by the YHD796 dye well-dispersed in the LCE matrix.

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Citations

Jul 21, 2020·Soft Matter·Xiuxiu WangMaosheng Cao
Oct 6, 2019·Nature Communications·Bo ZuoHong Yang
Aug 12, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Chengzhen ChuShaobing Zhou
Aug 23, 2017·Chemical Communications : Chem Comm·Kara M HarmatysBradley D Smith
Oct 4, 2019·European Journal of Organic Chemistry·Hannah H McGarraughBradley D Smith
Apr 22, 2021·Nature Communications·Zhen-Zhou NieHong Yang
Jul 4, 2021·International Journal of Pharmaceutics·Achalla Vaishnav Pavan KumarPrashant Kesharwani
Nov 14, 2018·The Journal of Organic Chemistry·Maria Annunziata M CapozziGianluca M Farinola

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Methods Mentioned

BETA
NMR
column chromatography
polarized
optical microscopy
X-ray

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