One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 301353-96-8, Name is P7C3, formurla is C21H18Br2N2O. In a document, author is Liu, Guoqing, introducing its new discovery. Recommanded Product: 301353-96-8.
Synthesis and properties of benzoxazole-based liquid crystals containing ethynyl group
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 degrees C (heating) and 31-141 degrees 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 (Delta n, 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 Delta n 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.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem