Nematic Thiophenes for STN-LCDS and Flexoelectric LCDS |
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| Authors: | Kevin Bartle Neil Campbell Warren L. Duffy Stephen M. Kelly Vicki Minter Mary O'Neill |
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| Affiliation: | 1. Department of Physics , The University of Hull , Hull , HU6 7RX , UK;2. Department of Chemistry , The University of Hull , Hull , HU6 7RX , UK;3. Defence Evaluation and Research Agency , St. Andrews Rd, Malvern, Worcs. , WR14 3PS , UK |
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| Abstract: | Abstract We report anew class of liquid crystals incorporating a 2,5-disubstituted thiophene ring and one or two conjugated trans-carbon-carbon double bonds in the terminal chain for use as components of nematic mixtures for TN-LCDs and STN-LCDs. The combination of these molecular elements contribute towards generating a high birefringence, a high nematic clearing point as well as a low viscosity for these materials. Several of these compounds exhibit a melting point below room temperature. This is the first time a room temperature nematic phase has been reported for phenyl thiophene derivatives. The new thiophene compounds can be used to induce a high birefringence in nematic mixtures for LCDs with short response times. |
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| Keywords: | nematics thiophenes high birefringence |
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