New pyridine based liquid crystalline esters with different terminal chains

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Atıf İçin Kopyala

Karanlık G., Ocak H., Eran B.

JOURNAL OF MOLECULAR STRUCTURE, cilt.1198, 2019 (SCI-Expanded)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 1198
• Basım Tarihi: 2019
• Doi Numarası: 10.1016/j.molstruc.2019.126930
• Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The synthesis, structural and mesomorphic characterization of new pyridine-based methyl esters carrying a n-alkoxy chain or 3,7-Dimethyloctyloxy branched group at terminal have been presented. The liquid crystalline properties of the new pyridine-based calamitic molecules have been investigated by polarized optical microscopy and differential scanning calorimetry. New compounds exhibit enantiotropic smectic A mesophase at a variable mesomorphic range depending on alkoxy chain length and branching at terminal. The presence of a branched terminal group in chiral or racemic form gives rise to a sharply increase in mesomorphic range as well as decrease in crystallization points by preserving mesophase type. (C) 2019 Elsevier B.V. All rights reserved.