title: Visualization of Ion Conductivity: Vapochromic Luminescence of an Ion-Conductive Ruthenium(II) Metalloligand-Based Porous Coordination Polymer.
abstract: We synthesized a new porous coordination polymer {La1.75(OH)1.25[Ru(dcbpy)3]· 16H2O} (La7-[4Ru]4; H2dcbpy = 4,4'-dicarboxy-2,2'-bipyridine) composed of a luminescent ruthenium(II) metalloligand [Ru(4,4'-dcbpy)3](4-) and La(3+) cations. X-ray analysis for La7-[4Ru]4 revealed that the La(3+) cations and [4Ru] metalloligands are crystallized in a molar ratio of 7:4 with OH(-) counteranions and a void fraction of ∼ 25.5%. Interestingly, La7-[4Ru]4 shows a reversible structural transition triggered by water ad/desorption, which affects not only the triplet metal-to-ligand charge-transfer ((3)MLCT) emission energy but also the ion conductivity in the solid state. This correlation suggests that La7-[4Ru]4 is an interesting material that enables visualization of the ion conductivity via the (3)MLCT emission energy.
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University , North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
authors.forename: Ayako
authors.initials: A
authors.lastname: Watanabe
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University , North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.|Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) , Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kobayashi
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University , North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
authors.forename: Erika
authors.initials: E
authors.lastname: Saitoh
authors.affiliation: School of Materials Science, Japan Advanced Institute of Science and Technology , 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Nagao
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University , North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University , North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
authors.forename: Masako
authors.initials: M
authors.lastname: Kato