title: Dual emission from luminescent nonalanthanide clusters.
abstract: Clusters containing nine lanthanide and six sodium ions are crystallized with the help of a tridentate ligand bearing a phosphonic acid group; the structure of the Eu(III) compound reveals a host-guest assembly Eu [symbol: see text] Na6Eu8L16 with a substantial quantum yield (32%). A similar Eu(III)-Yb(III) structure displays dual luminescence in the visible (Eu(III)) and NIR (Yb(III)) ranges.
authors.affiliation: Laboratory of Lanthanide Supramolecular Chemistry, Ecole Polytechnique Fédérale de Lausanne, BCH 1402, CH-1015 Lausanne, Switzerland.
authors.forename: Steve
authors.initials: S
authors.lastname: Comby
authors.forename: Rosario
authors.initials: R
authors.lastname: Scopelliti
authors.forename: Daniel
authors.initials: D
authors.lastname: Imbert
authors.forename: Loïc
authors.initials: L
authors.lastname: Charbonnière
authors.forename: Raymond
authors.initials: R
authors.lastname: Ziessel
authors.forename: Jean-Claude G
authors.initials: JC
authors.lastname: Bünzli