摘要
设计并合成了３个低温冠醚液晶──单臂脂环冠醚液晶，考察了冠醚结构与液晶性质的关系，单臂冠醚液晶分子具有液晶性质应满足长径比大于３，分子具有一定的平面特性和能通过引入手性基团使单臂冠醚液晶分子产生手性近晶相等条件。
With the aid of CPK molecular model,three monoarmed alicyclic crown ether containing 15-crown-5 unit liquid crystals (1-3) were first synthesized.The transition temperatures were T_(KSc)-7.5 T_(Sc*N) 18.2 T_(NI)23.6 for 1,T_(KI)91.1 T_(IN)82.6T_(NSc*)70.4 T_(Sc*K) 50.3 for 2and T_(KC) 33.87 T_(CN) 46.7 T_(NI) 64.4 for 3. The relationship between structures and properties was investigated,which revealed that monoarmed crown ether liquid crystals could possess mesomorphism not only when the ratio of molecular length to diameter was larger than 3,but also the molecular plarity was required.By inserting chiral group,chiral smetic phases were resulted.It is worth mentioning that the synthesis of crown ether liquid crystals with chirality is hitherto also a new attempt.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第3期405-409,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
冠醚
液晶
性质
结构
Crown ether liquid crystals, Liquid crystalline properties, Structures
