title: A Metallo-molecular Cage That Can Close the Apertures with Coordination Bonds.
abstract: We designed a novel tricobalt(III) metallo-molecular cage in which its apertures can be closed with bifunctional ligands via coordination bonds. A closed-cage complex was easily formed by ligand exchange of its open-cage analogue. Guest uptake/release by the open-cage complex was sufficiently fast to quickly reach guest-binding equilibrium, while that by the closed-cage complex was extremely slow and took about 1 week to reach equilibrium. The guest uptake was retarded by at least 2000 times by introduction of the bifunctional ligands at the cage apertures.
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan.
authors.forename: Shigehisa
authors.identifier: 0000-0003-0447-5057
authors.initials: S
authors.lastname: Akine
authors.affiliation: Faculty of Pure and Applied Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Miyashita
authors.affiliation: Faculty of Pure and Applied Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nabeshima