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Synchronized On/Off Switching of Four Binding Sites for Water in a Molecular Solomon Link

机译:在分子所罗门联系中同步四个粘合部位的四个结合位点

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A molecular Solomon link adopts different conformations in acetonitrile (1) and in water (2). Contrary to expectations, the main driving force of the transformation is not the change in medium polarity, but the cooperative binding of about four molecules of water, forming a tiny droplet in the central cavity of 2. Mechanistic studies reveal that the four binding sites can simultaneously switch between an inactive state (unable to bind water) and an active state (able to bind water) during the transformation. Spatial and temporal coordination of switching events is commonly observed in biological systems but has been rarely achieved in artificial systems. Here, the concerted activation of the four switchable sites is controlled by the topology of the whole molecule.
机译:分子索伦仑连杆采用乙腈(1)和水(2)的不同构象。 与期望相反,转化的主要驱动力不是中间极性的变化,而是大约四个水分子的合作结合,在中央腔中形成微小的液滴。机械研究表明,四个结合位点可以 在转换期间同时在无活性状态(不能粘合水)和活性状态(能够结合水)之间的切换。 在生物系统中通常观察到切换事件的空间和时间协调,但在人工系统中很少实现。 这里,通过整个分子的拓扑来控制四个可切换站点的协调激活。

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