Preparation of troponoid liquid crystals with a flexible oxymethylene linking unit
作者:Akira Mori、Hisashi Taya、Hitoshi Takeshita、Seiji Ujiie
DOI:10.1039/a704536k
日期:——
2-Benzyloxytropones, which have a saturated oxymethylene (–CH2O–) linking unit, show a monotropic smectic A phase while the corresponding alkoxybenzyl alkoxyphenyl ethers have poor mesogenic properties. The tropone carbonyl group acting as a dipolar lateral substituent enhances the smectic thermal stability.
具有饱和氧亚甲基(-CH2O-)连接单元的 2-苄氧基托品呈现出单向晶相,而相应的烷氧基苄基烷氧基苯基醚则具有较差的中生特性。作为双极性横向取代基的托品羰基增强了共晶热稳定性。