An M2L4 Molecular Capsule with a Redox Switchable Polyradical Shell. Issue 48 (28th October 2016)

• Record Type: Journal Article
• Authors: Yazaki, Kohei; Noda, Shogo; Tanaka, Yuya; Sei, Yoshihisa; Akita, Munetaka; Yoshizawa, Michito
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 48(2016)
• Page Start: 15031
• Page End: 15034
• Publication Date: 2016-10-28
• Subjects: capsules -- coordination chemistry -- dihydrophenazine -- radical cations -- redox systems; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201608350
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Preparation of molecular nanostructures with polyradical frameworks remains a significant challenge because of the limited synthetic accessibility which is entirely different from that of neutral and ionic ones. Herein we report the quantitative formation of a new M2 L4 molecular capsule from metal ions and dihydrophenazine‐based ligands. The capsule has a spherical nanocavity (ca. 1 nm in diameter) enclosed by eight redox‐active, dihydrophenazine panels. Electrochemical oxidation of the capsule leads to the generation of multiple radical cations on the shell framework. Moreover, a stable tetra(radical cation) capsule can be reversibly obtained by chemical as well as electrochemical oxidation. Abstract : Polyradical capsule : A new M2 L4 molecular capsule is quantitatively formed by mixing metal ions and dihydrophenazine‐based ligands. The capsule has a spherical nanocavity enclosed by eight redox‐active, dihydrophenazine panels. Electrochemical and chemical oxidation of the capsule leads to the reversible generation of a stable tetra(radical cation) capsule.