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- W4307331521 abstract "A series of liquid crystals comprising a heterocyclics dihydro pyrrole and 1,2,3-triazole rings [VII]-[X] were synthesized by many steps starting from a reaction of 3,3'-dimethyl-[1,1'-biphenyl]-4,4'-diamine with chloroacetyl chloride in a mixture of solutions DMF and TEA to synthesise the compounds [I], then the compounds [I] reacted with malononitrile in 1,4-dioxane and TEA solutions to produce compounds [II], then the first step is repeated with compound [II] where it reacted with chloroacetyl chloride in mixture of DMF and TEA to give compound [III], this compound reacted with sodium azide in the presence of sodium chloride and DMF as solvent to produce the compound [IV], which reacted with acrylic acid by a 1.3 dipolar reaction in solvent THF to give compound [V], this compound which reacted with thionyl chloride to gave carbonyl chlorides compound [VI], finally the last compound reacted with a variety of amines to product compounds [VII]a-d. The structures of the synthesized compounds were actually determined by Fourier-transform infrared spectroscopy FT-IR and Proton nuclear magnetic resonance 1H-NMR, The properties of liquid crystalline were characterized by hot stage Polarising Optical Microscope POM. The synthesized molecules exhibited enantiotropic liquid crystal phases, and the compounds [VII]a-d exhibited an enantiotropic nematic phase only.liquid crystal" @default.
- W4307331521 created "2022-10-31" @default.
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- W4307331521 date "2022-10-26" @default.
- W4307331521 modified "2023-09-26" @default.
- W4307331521 title "Heterocyclic compounds-based liquid crystals" @default.
- W4307331521 doi "https://doi.org/10.53730/ijhs.v6ns10.13557" @default.
- W4307331521 hasPublicationYear "2022" @default.
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