title: A new family of four-ring bent-core nematic liquid crystals with highly polar transverse and end groups.
abstract: Non-symmetrically substituted four-ring achiral bent-core compounds with polar substituents, i.e.., chloro in the bent or transverse direction in the central core and cyano in the lateral direction at one terminal end of the molecule, are designed and synthesized. These molecules possess an alkoxy chain attached at only one end of the bent-core molecule. The molecular structure characterization is consistent with data from elemental and spectroscopic analysis. The materials thermal behaviour and phase characterization have been investigated by differential scanning calorimetry and polarizing microscopy. All the compounds exhibit a wide-ranging monotropic nematic phase.
authors: Chemistry Department, Assam University, Silchar-788011, Assam, India, phone 919435522541, fax 913842270806.
authors: Kalpana
authors: K
authors: Upadhyaya
authors: Venkatesh
authors: V
authors: Gude
authors: Golam
authors: G
authors: Mohiuddin
authors: Rao V S
authors: RV
authors: Nandiraju
keywords: bent-core mesogens; cyanobiphenyl; dipole moment; liquid crystals; nematic phase; polarity
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