Matsumoto Kyosuke, Kusaba Shunsuke, Tanaka Yuya, Sei Yoshihisa, Akita Munetaka, Aritani Kazushi, Haga Masa-Aki, Yoshizawa Michito
Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
Department of Applied Chemistry, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan.
Angew Chem Int Ed Engl. 2019 Jun 17;58(25):8463-8467. doi: 10.1002/anie.201903117. Epub 2019 May 10.
Synthesis of molecular containers capable of incorporating multiple fullerenes remains challenging. Reported here is that room-temperature mixing of metal ions with W-shaped bispyridine ligands featuring polyaromatic panels results in the quantitative formation of a peanut-shaped M L capsule. The capsule reversibly converts into two molecules of an ML double tube in response to changes in the solvent. Notably, the capsule allows the incorporation of two fullerene molecules into the connected two spherical cavities at room temperature. The close proximity yet non-contact of the encapsulated C molecules, with a separation of 6.4 Å, was revealed by X-ray crystallographic analysis. The resultant, unusual fullerene dimer undergoes sequential reduction within the capsule to generate (C ) , C ⋅C , and (C ) species. Furthermore, temperature-controlled stepwise incorporation of two C molecules into the capsule is demonstrated.
合成能够容纳多个富勒烯的分子容器仍然具有挑战性。本文报道，金属离子与具有多芳族面板的W形双吡啶配体在室温下混合，定量形成花生形的ML胶囊。响应于溶剂的变化，该胶囊可逆地转化为两个ML双管分子。值得注意的是，该胶囊在室温下能够将两个富勒烯分子纳入相连的两个球形空腔中。X射线晶体学分析表明，被封装的C分子紧密相邻但不接触，间距为6.4 Å。所得的不寻常的富勒烯二聚体在胶囊内依次还原，生成(C ) 、C ⋅C 和(C ) 物种。此外，还展示了将两个C分子逐步温控纳入胶囊的过程。
