A meta-terphenyl moiety has been employed as a stopper in a Stoddart-type [2]rotaxane, which is formed in a remarkably high yield due to the additional templating effect of the stoppers. Making use of the recognition between bis(pyridinium)ethane and dibenzo-24-crown-8 ether, the [2]rotaxanes with m-terphenyl and m-terphenyl-capped dendritic stoppers have been synthesized by a threading procedure. The [2]rotaxane 7 displays two bielectronic redox waves while the [2]rotaxanes 10 and 11 show four distinct monoelectronic redox waves.
间三联苯部分已被用作斯托达特型[2]轮烷中的
终止剂,由于
终止剂的额外模板效应,其以非常高的产率形成。利用双(
吡啶鎓)
乙烷和二苯并-24-冠-8醚之间的识别,通过螺纹程序合成了具有
间三联苯和
间三联苯封端的树枝状
终止剂的[2]轮烷。 [2]轮烷7显示两个双电子氧化还原波,而[2]轮烷10和11显示四个不同的单电子氧化还原波。