3C09 逆方向の双極子モーメントを持つ2環性ツイン型トロポノイド液晶の混和試験

抄録

Twin type compounds (2), in which two tropone carbonyl groups direct inside, showed a smectic C phase on cooling process. Twin type compounds (3) with the opposite dipole moment were not mesogenic. A binary system between 2 and 3 induced a smectic A phase enanfiotropically. Clearing points of the smectic A phase were. higher than those of the smectic C phase of 2, and pronounced odd-even effect of inner alkylene chain length was observed. From X-ray diffraction study, a molecular packing model perpendicular to the lamellar planes was proposed, in which the dipole moment of tropone rings would be canceled.