Synthesis and evaluation of dinaphthylacetylene nematic liquid crystals for high-birefringence materials |
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| Authors: | Yuki Arakawa Shunpei Nakajima Masayuki Shigeta Junji Watanabe |
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| Institution: | Department of Organic and Polymeric Materials , Tokyo Institute of Technology , Tokyo , Japan |
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| Abstract: | We synthesised 1,2-bis(6-alkoxy-2-naphthyl)acetylene as a new dinaphthylacetylene liquid crystal (LC) compound with alkoxy tails of length m (DNA–OCm) and characterised their phase behaviour by polarising optical microscopy and differential scanning calorimetry, where all compounds exhibited a nematic phase. Also, we measured the actual, and not extrapolated, Δn values of this target compound, and our results show the birefringence potential of the pure LC compound. They have high birefringence values, with the highest value of approximately 0.5 obtained for DNA–OC2 at 550 nm at 10°C above the nematic?crystal transition temperature. |
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| Keywords: | tolane birefringence nematic phase |
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