A self-assembled M2L2 truncated square and its application as a container for fullerenes.
A self-assembled M2L2 truncated square and its application as a container for fullerenes.
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自组装M2L2截角正方形及其作为富勒烯容器的应用。
DOI：
10.1039/d1cc05581j
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发表时间：
2021
影响因子：
4.9
通讯作者：
K. Zhu
中科院分区：
文献类型：
--
作者：
Jun;Wan Lv;Anquan Li;K. Zhu
设计并合成了一种新型的双硫蒽联吡啶配体，用于配位驱动自组装。这种构象动态连接体与90°会聚金属角的组合专门提供了新的M2 L2截短的方形金属大环。单晶的X射线结构揭示了一个带状的几何形状与腔直径约为。13.7埃。透气腔和富电子硫蒽嵌板能够高效结合富勒烯C60（Ka = 5.1 × 106 M-1）和C70（Ka = 3.7 × 106 M-1）。通过核磁共振、质谱和单晶X射线衍射分析完全证实了C60的包封。循环伏安图进一步揭示了截短的正方形具有氧化还原活性。噻蒽类金属大环化合物的强结合亲和力、自适应络合作用和氧化还原活性为超分子主体的设计提供了新的思路。
An unprecedented bisthianthrene dipyridyl ligand was designed and synthesized for coordination driven self-assembly. The combination of this conformationally dynamic linker with a 90° convergent metal corner exclusively afforded a novel M2L2 truncated square-like metallamacrocycle. The single crystal X-ray structure reveals a belt-shaped geometry with a cavity diameter of ca. 13.7 Å. The breathable cavity and electron-rich thianthreno panels enable the highly efficient binding of the fullerenes C60 (Ka = 5.1 × 106 M-1) and C70 (Ka = 3.7 × 106 M-1). The encapsulation of C60 is fully confirmed by NMR, mass spectroscopy and single crystal X-ray diffraction analyses. The cyclic voltammograms further reveal that the truncated square is redox active. The strong binding affinity, adaptive complexation, and redox activity of the thianthrene-incorporated metallamacrocycle provide new insights into the design of supramolecular hosts.