1100161-08-7Relevant academic research and scientific papers
Photochromic glassy liquid crystals comprising mesogenic pendants to dithienylethene cores
Kim, Chunki,Marshall, Kenneth L.,Wallace, Jason U.,Chen, Shaw H.
experimental part, p. 5592 - 5598 (2010/03/03)
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.
