作者:Laura de Vega、Pedro D. Ortiz、Gunther Hennrich、Ana Omenat、Rosa M. Tejedor、Joaquín Barberá、Berta Gómez-Lor、José Luis Serrano
DOI:10.1021/jp1004727
日期:2010.4.15
phenylacetylene extended biphenyl mesogens substituted with different chiral alkoxy chains, starting from commercially available 4-(4′-bromophenyl)phenol. Depending on the position of the chiral center and the polar nature of the target molecules as determined by the electron withdrawing end-groups, different types of smectic liquid crystals are formed. The liquid crystal phases are fully characterized
标准的Sonogashira偶联从商业上可获得的4-(4'-溴苯基)苯酚开始,提供被不同的手性烷氧基链取代的棒状,苯乙炔延伸的联苯液晶元。取决于由吸电子端基确定的手性中心的位置和靶分子的极性,形成不同类型的近晶液晶。液晶相通过偏振光学显微镜,差示扫描量热法和X射线衍射充分表征。在两种情况下,分子手性被转移到超分子组装体,这通过在手性中间相中的圆二色性测量来证明。