1B07 フルオロ不斉骨格を持つ強誘電液晶性ポリチオフェン誘導体の合成と性質

概要

論文の詳細を見る
Ferroelectric liquid crystalline (FLC) substituent with fluorinated asymmetric moiety were introduced into the 3-position of thiophene ring. The polymerization of 2, 5 - dibrominated thiophene monomers were carried out through dehalogenative polycondensation. Poly (3-FLC substituted thiophene) derivatives were fusible and soluble in ordinary organic solvents. Number-average molecular weights of the polymers were 1.2×10^4 . UV-Vis absorption band were observed from 400 to 415 nm. Phase transition behaviors of the polymers and monomers were examined by differential scanning calorimetry (DSC), polarizing optical microscope (POM) and X-ray diffraction (XRD). One of the polymers showed chiral smecfic C phase in the heating and cooling processes. It was found that the main chain conjugation were enhanced by spontaneous orientation of the FLC side chains.
日本液晶学会の論文
1998-10-12