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Interlocked porphyrin switches

机译:互锁的卟啉开关

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We describe the synthesis of a series of interlocked structures from porphyrin-glycoluril cage compounds and bis(olefin)-terminated viologens by an olefin-metathesis protocol. The length of the chain connecting the olefin substituents with the viologen has a marked effect on the products of the ring-closure reaction. Long chains give [2]- and [3]catenane structures, whereas short chains give a mixture of [3]-, [4]-, and [5]catenanes. For comparison several [2]rotaxane compounds were prepared. The interlocked catenane and rotaxane structures display switching behavior, which can be controlled by the addition of acid and base. The kinetic and thermodynamic parameters of the switching processes have been determined by NMR spectroscopy.
机译:我们描述了一系列互锁结构的卟啉-乙二醇尿嘧啶笼化合物和双(烯烃)终止紫精通过烯烃复分解协议的合成。连接烯烃取代基和紫精的链的长度对闭环反应的产物有显着影响。长链给出[2]-和[3] catenane结构,而短链给出[3]-,[4]-和[5] catenanes的混合物。为了比较,制备了几种[2]轮烷化合物。联锁的链烷和轮烷结构显示出切换行为,可以通过添加酸和碱来控制切换行为。转换过程的动力学和热力学参数已通过NMR光谱测定。

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