The synthesis and dielectric properties of a new phenylbenzoate-based calamitic liquid crystal

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Atıf İçin Kopyala

Ahlatcıoğlu Özerol E., OCAK H., BİLGİN ERAN B., Karavelioğlu S.

Journal of the Iranian Chemical Society, cilt.18, sa.1, ss.225-232, 2021 (SCI-Expanded)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 18 Sayı: 1
• Basım Tarihi: 2021
• Doi Numarası: 10.1007/s13738-020-02021-x
• Dergi Adı: Journal of the Iranian Chemical Society
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier
• Sayfa Sayıları: ss.225-232
• Anahtar Kelimeler: Calamitic liquid crystal, (S)-3, 7-Dimethyloctyloxychiral unit, Smectic phase, Dielectric properties, BENZOATE DERIVATIVES, CHAIN-LENGTH, BEHAVIOR, TEMPERATURE, ABSORPTION, PARAMETERS, COMPLEXES, MESOGENS, DIMERS
• Yıldız Teknik Üniversitesi Adresli: Evet

Özet

© 2020, Iranian Chemical Society.The dielectric investigation has a great importance in liquid crystal studies as a supportive method to DSC for a complete characterization of liquid crystals as well as in the electronic applications. In this study, the synthesis, mesomorphic characterization and dielectric properties of a new phenylbenzoate-based three-ring calamitic liquid crystal which composed of ester linking groups, (S)-3,7-dimethyloctyloxy chiral unit at one of terminals and n-octyloxy chain at the other end of the molecule, have been reported. The new calamitic liquid crystal 4-[4-((S)-3,7-dimethyloctyloxy)phenoxy)carbonyl]phenyl 4-(n-octyloxy)benzoate (DPCPB) has been characterized using 1H, 13C-NMR and MS-QTOF. The liquid crystalline behavior of the target compound has been investigated by differential scanning calorimetry and optical polarizing microscopy. DPCPB exhibits an enantiotropic non-tilted smectic mesophase in a wide temperature range. The real and imaginary dielectric constant, conductivity mechanism, impedance and dielectric relaxation mechanism of DPCPB have been investigated depending on frequency at different temperatures.