title: Bifunctional mixed-lanthanide cyano-bridged coordination polymers Ln(0.5)Ln'(0.5)(H2O)5[W(CN)8] (Ln/Ln' = Eu3+/Tb3+, Eu3+/Gd3+, Tb3+/Sm3+).
abstract: A new family of mixed-lanthanide cyano-bridged coordination polymers Ln(0.5)Ln'(0.5)(H(2)O)(5)[W(CN)(8)] (where Ln/Ln' = Eu(3+)/Tb(3+), Eu(3+)/Gd(3+), and Tb(3+)/Sm(3+)) containing two lanthanide and one transition metal ions were obtained and characterized by X-ray diffraction, photoluminescence spectroscopy, magnetic analyses, and theoretical computation. These compounds are isotypical and crystallize in the tetragonal system P4/nmm forming two-dimensional grid-like networks. They present a magnetic ordering at low temperature and display the red Eu(3+) ((5)D(0) → (7)F(0-4)) and green Tb(3+) ((5)D(4) → (7)F(6-2)) characteristic photoluminescence. The Tb(0.5)Eu(0.5)(H(2)O)(5)[W(CN)(8)] compound presents therefore green and red emission and shows Tb(3+)-to-Eu(3+) energy transfer.
authors: Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Chimie Moléculaire et Organisation du Solide, Université Montpellier II, Place E. Bataillon, 34095 Montpellier cedex 5, France.
authors: Elena
authors: E
authors: Chelebaeva
authors: Jérôme
authors: J
authors: Long
authors: Joulia
authors: J
authors: Larionova
authors: Rute A S
authors: RA
authors: Ferreira
authors: Luis D
authors: LD
authors: Carlos
authors: Filipe A
authors: FA
authors: Almeida Paz
authors: José B R
authors: JB
authors: Gomes
authors: Alexander
authors: A
authors: Trifonov
authors: Christian
authors: C
authors: Guérin
authors: Yannick
authors: Y
authors: Guari