Synthesis, transition temperatures, and optical properties of compounds with simple phenyl units linked by double bond, triple bond, ester or propiolate linkages
作者:Gregory J. Cross、Alexander J. Seed、Kenneth J. Toyne、John W. Goodby、Michael Hird、M. Carmen Artal
DOI:10.1039/b001164i
日期:——
A series of compounds has been prepared with 4-butylsulfanylphenyl and 4-cyano- or 4-isothiocyanato-phenyl units connected by -CHCH-, -COO-, -CC-, or -CC-COO- linking groups. The synthesis of the novel compounds is presented and the transition temperatures and optical parameters of the compounds are discussed and compared with those for related biphenyl reference systems. The ester linking group reduces optical and polarisability anisotropy, but the other linking groups give increased optical anisotropy (up to Δn = 0.50) and polarisability anisotropy [up to Δα = 45.2 Å3 (10−30 m3)].
已合成一系列化合物,含有通过-CHCH-、-COO-、-CC-或-CC-COO-连接基团连接的4-丁硫基苯基和4-氰基或4-异硫氰酸苯基单元。介绍了这些新型化合物的合成,并讨论了其转变温度和光学参数,与相关的联苯参考系统进行了比较。酯连接基团降低了光学各向异性性和极化率各向异性性,但其他连接基团则增加了光学各向异性性(高达Δn = 0.50)和极化率各向异性性[高达Δα = 45.2 ų(10−30 m³)]。