Synthesis, Structural and Mesomorphic Characterization of New Three-Ring Chalcone-Imine Derivatives with Polar End Groups

Authors : Ceren Can Karanlık

Pages : 657-664

Doi:10.19113/sdufenbed.1797499

View : 55 | Download : 267

Publication Date : 2025-12-25

Article Type : Research Paper

Abstract :In this study, new chalcone-imine derivatives composed of three-benzene-ring central unit containing n-dodecyloxy group at one end and cyano or bromo group at other end have been synthesized. Chemical structures of the obtained derivatives have been clarified by spectral analyses (1H-, 13C/APT-NMR and FT-IR). The mesomorphic behaviour and optical textures of the derivatives have been observed by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). It was determined that cyano-terminated chalcone-imine derivative (3a) exhibits enantiotropic SmA mesophase, characterized by thermal range of 19 ˚C and also a M mesophase, while bromo-terminated chalcone-imine derivative (3b) does not show any mesomorphic behaviour. This result emphasizes that the type and the nature of the polar end group has a huge impact on the liquid crystalline properties of the molecules.
Keywords : Sıvı kristaller, Kalkon-imin türevleri, Mesomorfik davranış, Çubuksu molekül

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