The synthesis and dethreading study of DB24C8-based pseudorotaxanes are reported. The pseudorotaxane axles contain ammonium and carbamate stations as well as a repulsive nonafluorobutyl group as one of the two extremities. This extremity prevents any threading of the DB24C8. However, dethreading of pseudorotaxanes is possible and the kinetic rate depends on the presence and localization in the encircled axle of secondary sites of interactions (carbamates).

中文翻译：

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关于通过 [2] 假轮烷中的全氟丁基末端对 Dibenzo-24-crown-8 大环进行脱螺纹的差异

报道了基于 DB24C8 的假轮烷的合成和脱线研究。伪轮烷轴包含铵和氨基甲酸酯站以及作为两个末端之一的排斥性九氟丁基。这个极端阻止了 DB24C8 的任何线程化。然而，假轮烷的脱螺纹是可能的，并且动力学速率取决于次级相互作用位点（氨基甲酸酯）的环绕轴中的存在和定位。