ウレア誘導体を用いた強誘電性カラムナー液晶相の実現

抄録

The urea derivatives possessing two or three urea moieties in them were designed and synthesized. Their phase transitions were measured by polarized light optical microscopy and differential scanning calorimetry. In X-ray diffraction measurement, some of the compounds showed rectangular columnar phases were observed. To confirm its ferroelectricity, optoelectronic studies and SHG experiments were carried out. Compound 1 with two urea units showed partial retention of the polarity and the mechanism for the ferroelectric behavior was estimated.