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- W3007540087 abstract "Series of heterocyclic compounds containing ethynyl group, 2-[4-[2-[4-(alkoxy)phenyl]ethynyl]phenyl] -benzoxazole derivatives (nPEPBx), are prepared and investigated. They display enantiotropic nematic and smectic mesophases with large mesophase ranges of 30–133°C (heating) and 31–141°C (cooling). Compared with reference analogues without ethynyl group, the compounds nPEPBx roughly give lower melting points and much higher nematic mesophase stability because of the introduction of triple carbon-carbon bond. Meanwhile, they show much higher birefringence (Δn, 0.50–0.65 and 0.55–0.68 for experimental and calculated values with density functional theory (DFT), respectively) than common tolane-based liquid crystals, which indicates that the introduction of benzoxazole unit is an effective method to enhance Δn values of the rod-like molecule. It is concluded that nPEPBx has a potential application in liquid crystal mixture as a dopant to enhance the performance of the host mixture." @default.
- W3007540087 created "2020-03-06" @default.
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- W3007540087 date "2020-02-17" @default.
- W3007540087 modified "2023-10-18" @default.
- W3007540087 title "Synthesis and properties of benzoxazole-based liquid crystals containing ethynyl group" @default.
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- W3007540087 doi "https://doi.org/10.1080/02678292.2020.1721582" @default.
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