Novel discotic mesogen: synthesis and liquid crystalline behavior of TAAB (tetrabenzo[b,f,j,n][1,5,9,13]tetraazacyclohexadecine) derivatives with long alkoxy chains†

Abstract

The self-condensation of 3,4-dialkoxy-2-aminobenzaldehyde (alkoxy = n-C₈H₁₇O, n-C₁₀H₂₁O and n-C₁₂H₂₅O) in the presence of HBF₄ gives the tetrafluoroborate salt of diprotonated octaalkoxy-TAAB which exhibits a hexagonal columnar mesophase over a wide range of temperatures including room temperature.

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