عنوان المقالة:Non-symmetrical bent-core homologous series bearing 1,2,4-oxadiazole core with a cholesterol terminal arm: Synthesis, characterization and their liquid crystalline properties Non-symmetrical bent-core homologous series bearing 1, 2, 4-oxadiazole core with a cholesterol terminal arm: Synthesis, characterization and their liquid crystalline properties
Nonsymmetric 1,2,4-oxadiazole derivatives with cholesteryl and alkoxy chain as end moieties exhibiting monotropic liquid crystalline behavior have been reported. The molecular structures have been confirmed by elemental analysis and spectroscopic studies. Differential scanning calorimetry (DSC) studies revealed multiple phase transitions and polarized optical microscopy (POM) investigations confirmed smectic A (SmA) and chiral nematic (N ∗) phases. The importance of alkyl chain length in mesophase formation is discussed. A comparison with other reported mesogenic materials possessing similar molecular structures is also discussed.
Abstract
Nonsymmetric 1,2,4-oxadiazole derivatives with cholesteryl and alkoxy chain as end moieties exhibiting monotropic liquid crystalline behavior have been reported. The molecular structures have been confirmed by elemental analysis and spectroscopic studies. Differential scanning calorimetry (DSC) studies revealed multiple phase transitions and polarized optical microscopy (POM) investigations confirmed smectic A (SmA) and chiral nematic (N*) phases. The importance of alkyl chain length in mesophase formation is discussed. A comparison with other reported mesogenic materials possessing similar molecular structures is also discussed.
غسان قيس علي | Ghassan Qays Ali | 4952