title: Inorganic cryptand: size-selective strong metallic cation encapsulation by a disilicoicosatungstate (Si2W20) polyoxometalate.
authors.affiliation: Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Yoshida
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Uehara
authors.forename: Shiro
authors.initials: S
authors.lastname: Hikichi
authors.forename: Noritaka
authors.initials: N
authors.lastname: Mizuno