Issue 7, 2016
From the journal:

Chemical Science

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

Ling-Xiang Guo,a   Mei-Hua Liu,a   Sayed Mir Sayed,a   Bao-Ping Lin,a   Patrick Keller,bcd   Xue-Qin Zhang,a   Ying Suna  and  Hong Yang*a  

* Corresponding authors

a School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Southeast University, Nanjing, China
E-mail: yangh@seu.edu.cn
Tel: +86-25-52090620

b Institut Curie, PSL Research University, CNRS, UMR 168, F-75005 Paris, France

c Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 168, F-75005 Paris, France

d Soft Materials Research Center and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA

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.

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

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Article information

DOI
https://doi.org/10.1039/C6SC00758A
Article type
Edge Article
Submitted
18 Feb 2016
Accepted
24 Mar 2016
First published
29 Mar 2016
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., 2016,7, 4400-4406

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

L. Guo, M. Liu, S. M. Sayed, B. Lin, P. Keller, X. Zhang, Y. Sun and H. Yang, Chem. Sci., 2016, 7, 4400 DOI: 10.1039/C6SC00758A

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