具有氰基联苯和胆固醇单元的四硫富瓦烯衍生物液晶的合成及介晶性质

Synthesis and mesogenic properties of liquid crystals of tetrathiafulvalene derivatives with cyanobiphenyl and cholesterol units

合成了3个四硫富瓦烯(TTF)衍生物1a-1c,在TTF的一侧由不同数目的亚甲基(间隔基)和氰基联苯相连,另一侧由等数目的亚甲基和胆固醇酯相连.并对其结构进行了表征,研究了这3个目标化合物的热稳定性、液晶性和电化学性质.研究结果表明,目标化合物具有良好的热稳定性,柔性链间隔基的长度对TTF衍生物的液晶性有显著影响.其中短间隔基的化合物1a和1b呈现单一的近晶相A(SA),长间隔基的化合物1c不具有液晶性.合成的化合物具有典型的四硫富瓦烯氧化还原性质.

Three tetrathiafulvalene(TTF)derivatives 1 a-1 c were synthesized,with one side connected by different numbers of methylene(spacer)and cyanobiphenyl and the other side linked by equal number of methyl and cholesterol esters.These three target compounds were characterized by the thermal stability,liquid crystallinity and electrochemical properties.The results showed that the target compounds had good thermal stability,and the length of the flexible chain spacer had a significant effect on the liquid crystallinity of TTF derivatives.Among them,the short spacer compounds 1 a and 1 b exhibited a single smectic phase A(S_A),and the long spacer compound 1 c did not have liquid crystallinity.The synthesized compounds had typical redox properties of tetrathiafulvalene.