Issue 46, 2008
From the journal:

Journal of Materials Chemistry

Photochromic glassy liquid crystals comprising mesogenic pendants to dithienylethene cores†

Chunki Kim,a   Kenneth L. Marshall,b   Jason U. Wallacea  and  Shaw H. Chen*ab  

* Corresponding authors

a Department of Chemical Engineering University of Rochester, Rochester, New York, USA

b Laboratory for Laser Energetics, 250 East River Road University of Rochester, Rochester, New York, USA

Abstract

Photochromic glassy liquid crystals were synthesized using dithienylethenes as the volume-excluding cores to which liquid crystalline mesogens were chemically bonded through alkyl spacers. Nematic, smectic, and cholesteric glassy liquid crystals were demonstrated with glass transition temperatures above 90 °C and clearing points up to 220 °C without traces of crystallization on cooling or crystalline melting on heating. A monodomain cholesteric glassy liquid crystalline film containing an enantiomeric 2-methylpropylene chiral spacer was characterized as a left-handed helical stack, exhibiting a selective reflection band centered at 686 nm, an orientational order parameter of 0.65 for the quasi-nematic layers, and a combination of reflective coloration with photoswitchable absorptive coloration.

Graphical abstract: Photochromic glassy liquid crystals comprising mesogenic pendants to dithienylethene cores

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B810955A
Article type
Paper
Submitted
27 Jun 2008
Accepted
10 Sep 2008
First published
22 Oct 2008

J. Mater. Chem., 2008,18, 5592-5598

Permissions

Request permissions

Photochromic glassy liquid crystals comprising mesogenic pendants to dithienylethene cores

C. Kim, K. L. Marshall, J. U. Wallace and S. H. Chen, J. Mater. Chem., 2008, 18, 5592 DOI: 10.1039/B810955A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements