Fluorescent liquid crystals with rod-shaped π-conjugated hydrocarbon core. Issue 2 (26th January 2019)

• Record Type: Journal Article
• Authors: Buchs, Jens; Geßner, André; Heyne, Benjamin; Janietz, Dietmar; Sawade, Hans
• Is Part Of: Liquid crystals. Volume 46:Issue 2(2019)
• Page Start: 281
• Page End: 298
• Publication Date: 2019-01-26
• Subjects: Phenylenevinylene -- phenylacetylene -- calamitc liquid crystal -- fluorescence; Liquid crystals -- Periodicals; 548.905
• DOI: 10.1080/02678292.2018.1499150
• Languages: English
• ISSNs: 0267-8292

Abstract

ABSTRACT: Calamitic fluorophores are presented possessing either two phenylethylene or phenylacetylene fragments which are connected via an aromatic entity. The new compounds exhibit smectic C and/or nematic liquid crystalline phases. The chromophores show fluorescence in the blue spectral region. Grafting acrylate functional groups to the termini of naphthalene centred members of the rod-shaped dyes provides new luminescent reactive mesogens. Uniaxial orientation of mixed systems of the acrylate fluorophores with non-emissive reactive benzoate nematogens was achieved by surface-assisted alignment on polyimide orientation layers. The photocrosslinked oriented films display linear polarised photoluminescence upon isotropic excitation. GRAPHICAL ABSTRACT: