A Peanut‐Shaped Polyaromatic Capsule: Solvent‐Dependent Transformation and Electronic Properties of a Non‐Contacted Fullerene Dimer. (10th May 2019)

• Record Type: Journal Article
• Authors: Matsumoto, Kyosuke; Kusaba, Shunsuke; Tanaka, Yuya; Sei, Yoshihisa; Akita, Munetaka; Aritani, Kazushi; Haga, Masa‐aki; Yoshizawa, Michito
• Is Part Of: Angewandte Chemie. Volume 131:Number 25(2019)
• Page Start: 8551
• Page End: 8555
• Publication Date: 2019-05-10
• Subjects: Einkapselung -- Fullerene -- Koordinationskapseln -- Radikalanionen -- Supramolekulare Chemie; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201903117
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 M2 L4 capsule. The capsule reversibly converts into two molecules of an ML2 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 C60 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 (C60 .− )2, C60 .− ⋅C60 2−, and (C60 2− )2 species. Furthermore, temperature‐controlled stepwise incorporation of two C60 molecules into the capsule is demonstrated. Abstract : Peanuts : Metallionen, W‐förmige Bispyridinliganden und Polyarene bilden in Abhängigkeit vom Lösungsmittel entweder eine erdnussförmige M2 L4 ‐Kapsel oder eine ML2 ‐Doppelröhre. Die Kapsel enthält zwei Fullerenmoleküle in den beiden verbundenen Hohlräumen im Abstand von 6.4 Å, und das resultierende Fulleren‐Dimer zeigt eine ungewöhnliche elektronische Kommunikation.