Photoisomerization of a chiral azobenzene dopant possessing only one asymmetric carbon, (R)-3-(1-methylhexyloxy)-3′-octyloxy-2,2′-dimethylazobenzene, was found to be able to specifically induce a helical twist inversion in liquid crystals having alkenyl terminal substituents, an alkenyl-selective interaction which was not found in conventional para-substituted azobenzenes.
研究发现,仅含有一个不对称碳的手性
偶氮苯掺杂剂(R)-3-(1-甲基己氧基)-3'-辛氧基-2,2'-二甲基
偶氮苯的光异构化能够特异性地诱导具有烯基末端取代基的液晶发生螺旋扭曲反转,这是一种烯基选择性相互作用,在传统的对位取代
偶氮苯中并未发现。