[2]Catenanes Displaying Switchable Gin-Trap-Like Motion

Sodium ion-controlled switching from “folded” to “linear” states results in significant changes in the molecular shape of a [2]­catenane, such that it mimics the operation of a gin trap, with a fluorescent alarm signal appearing when pyrene side arms were present on its two macrocyclic components.钠离子调控的“折叠态”至“线型态”开关过程，可使[2]索烃（[2]catenane）的分子形貌发生显著变化，其运作机制模拟捕鼠夹的工作原理；当该索烃的两个大环组分上带有芘侧臂时，体系会产生荧光报警信号。