Conformational control of aliphatic oligoketones bearing two 1,3-diketone subunits is achieved by molecular recognition with pillar[5]arene. Pillar[5]arene binds to aliphaticketones, with association constants K of ∼10 M–1, to form pseudorotaxanes. The pseudorotaxanes are locked by BF2 complexation at the 1,3-diketone sites through quasi-solid-state reactions. X-ray crystallography reveals linear conformations
带有两个1,3-二酮亚基的脂肪族低聚酮的构象控制是通过使用柱[5]芳烃进行分子识别来实现的。支柱[5]芳烃与脂肪族酮结合,缔合常数K为〜10 M –1,形成假轮烷。伪轮烷通过准固态反应被BF 2络合锁定在1,3-二酮位。X射线晶体学揭示了轴分子的线性构象。超分子构象限制的影响是使用烷基连接的二元生色团系统进行评估的,该系统在分子内聚集时会显示溶剂化变色现象。