Rigid phenylene ethynylene units linked by a V-shaped centre. An approach to biaxial nematogens?

M Lehmann, J Levin

Index: Lehmann, Matthias; Levin, Jeremy Molecular Crystals and Liquid Crystals, 2004 , vol. 411, p. 273/[1315]-281/[1323]

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Citation Number: 26

Abstract

Encouraged by theoretical predictions that nematic phases formed from V-shaped compounds could be biaxial, shape-persistent phenylene ethynylene arms linked by 1, 3- phenylene, 4, 4′-diphenylenemethane and 3, 6-fluorenone units have been synthesised. Crystallisation and micro-segregation is prevented by 2, 5-alkoxy substitution on the middle benzene ring of the arms. The specific molecular engineering, ie variation of peripheral ...