The synthesis and resolution of the chiral dopant (R)-2,2â²-spirobiindan-5,5â²-diheptyloxy-1,1â²-dione is described. This new compound is doped in achiral SmC liquid crystal hosts to give a ferroelectric SmC* phase. The polarization power of the dopant varies with the core structure of the SmC host, from <+10 to +803 nC cmâ2, and the sign of spontaneous polarization induced by the (R)-enantiomer of the chiral dopant is consistent with that predicted by the Boulder model.
本文介绍了手性掺杂剂 (R)-2,2â²-spirobiindan-5,5â²-diheptyloxy-1,1â²-dione 的合成和解析。这种新化合物掺杂在非手性 SmC 液晶宿主中,产生了
铁电 SmC* 相。掺杂剂的极化功率随 SmC 主晶的核心结构而变化,从 <+10 到 +803 nC cmâ2 不等,手性掺杂剂的 (R) 对映异构体诱导的自发极化的符号与 Boulder 模型预测的一致。