Main‐Chain Liquid Crystalline Polymers Based on Bis‐Etherified 9,9‐Dihexyl‐2,7‐bis(4′‐hydroxy‐1,1′‐biphen‐4‐yl)fluorenes
- 2 July 2007
- journal article
- research article
- Published by Wiley in Macromolecular Chemistry and Physics
- Vol. 208 (13) , 1458-1468
Abstract
A series of liquid crystalline compounds based on 2,7‐bis(biphenyl)fluorenes was synthesised by a Suzuki cross‐coupling reaction and subsequent etherification with different bromoalkenes. By simple variations of the chain lengths the temperature range in which the nematic mesophase is present could be tuned. The described approach offers the possibility of covalent incorporation of the mesogens into polymers via olefin metathesis techniques, resulting in enlarged stability of the mesophase. Monomers and polymers could be easily aligned on rubbed polyimide substrates as revealed by polarised absorption spectroscopy. magnified imageKeywords
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