title: Lanthanide-doped luminescent ionogels.
abstract: Ionogels are solid oxide host networks confining at a meso-scale ionic liquids, and retaining their liquid nature. Ionogels were obtained by dissolving lanthanide(III) complexes in the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C6mim][Tf2N], followed by confinement of the lanthanide-doped ionic liquid mixtures in the pores of a nano-porous silica network. [C6mim][Ln(tta)4], where tta is 2-thenoyltrifluoroacetonate and Ln=Nd, Sm, Eu, Ho, Er, Yb, and [choline]3[Tb(dpa)3], where dpa=pyridine-2,6-dicarboxylate (dipicolinate), were chosen as the lanthanide complexes. The ionogels are luminescent, ion-conductive inorganic-organic hybrid materials. Depending on the lanthanide(III) ion, emission in the visible or the near-infrared regions of the electromagnetic spectrum was observed. The work presented herein highlights that the confinement did not disturb the first coordination sphere of the lanthanide ions and also showed the excellent luminescence performance of the lanthanide tetrakis beta-diketonate complexes. The crystal structures of the complexes [C6mim][Yb(tta)4] and [choline]3[Tb(dpa)3] are reported.
authors.affiliation: Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F-bus 2404, B-3001, Leuven, Belgium.
authors.forename: Kyra
authors.initials: K
authors.lastname: Lunstroot
authors.forename: Kris
authors.initials: K
authors.lastname: Driesen
authors.forename: Peter
authors.initials: P
authors.lastname: Nockemann
authors.forename: Kristof
authors.initials: K
authors.lastname: Van Hecke
authors.forename: Luc
authors.initials: L
authors.lastname: Van Meervelt
authors.forename: Christiane
authors.initials: C
authors.lastname: Görller-Walrand
authors.forename: Koen
authors.initials: K
authors.lastname: Binnemans
authors.forename: Séverine
authors.initials: S
authors.lastname: Bellayer
authors.forename: Lydie
authors.initials: L
authors.lastname: Viau
authors.forename: Jean
authors.initials: J
authors.lastname: Le Bideau
authors.forename: André
authors.initials: A
authors.lastname: Vioux