Mesomorphic and fluorescence properties of methyl 4-(4-alkoxystyryl)benzoates. Issue 7 (27th May 2016)

• Record Type: Journal Article
• Authors: Muhammad, Khushi; Nazir, Saba; Hameed, Shahid; Bechtold, Ivan H.
• Is Part Of: Liquid crystals. Volume 43:Issue 7(2016)
• Page Start: 863
• Page End: 873
• Publication Date: 2016-05-27
• Subjects: styryl esters -- banded focal-conic -- Smectic E phase -- fluorescent LC; Liquid crystals -- Periodicals; 548.905
• DOI: 10.1080/02678292.2016.1148205
• Languages: English
• ISSNs: 0267-8292

Abstract

ABSTRACT: A series of methyl 4-(4-alkoxystyryl)benzoates was synthesised and studied for liquid crystalline and fluorescence properties. The peculiarity of the reaction scheme involved condensation between 4-alkoxybenzaldehyde and 4-(methoxycarbonyl)benzyltriphenyl phosphonium bromide in dichloromethane without any phase separation. The compounds were found thermally stable up to 200°C. The banded or arced focal-conic fan texture of CrE phase was exhibited on cooling the compounds (with chain length > C4 ) below the SmA phase. It was observed that increasing chain length up to C10 enhances mesophase stability. No LC behaviour was manifested by small (up to C3 ) and branched small chain (up to C4 ) members of the series. GRAPHICAL ABSTRACT: