AbstractMetal‐metal bonds have rarely been explored as active elements in supramolecular assemblies despite their unique potential to introduce responsive behavior. In this report, a dynamic molecular container composed of two cyclometalated Pt units is constructed using Pt−Pt bonds. This molecule—the flytrap—has a flexible jaw composed of two [18]crown‐6 ethers that can adapt their shape to bind large inorganic cations with sub‐micromolar affinity. Along with the spectroscopic and crystallographic characterization of the flytrap, we report its photochemical assembly, which allows the capture of ions and their transport from solution to the solid state. In addition, we have been able to recycle the flytrap to regenerate its starting material due to the reversible nature of the Pt−Pt bond. We believe that other molecular containers and materials for harvesting valuable substrates from solution could be assembled using the advances presented here.
摘要 尽管金属-金属键具有引入响应行为的独特潜力,但很少有人将其作为超分子组装体中的活性元素进行探索。本报告利用铂-铂键构建了一个由两个环金属化铂单元组成的动态分子容器。这种分子--捕蝇草--具有一个由两个[18]冠-6醚组成的柔性下颚,可以调整其形状,以亚微摩级的亲和力结合大型无机阳离子。除了捕蝇草的光谱学和晶体学特征之外,我们还报告了它的光化学组装,它可以捕获离子并将其从溶液传输到固态。此外,由于铂铂键(Pt-Pt bond)的可逆性,我们还能够回收捕蝇草以再生其起始材料。我们相信,利用本文介绍的进展,还可以组装出其他分子容器和材料,从溶液中获取有价值的基质。