title: Luminescent properties of europium complexes with bis(diphenylphosphino)alkane dioxides.
abstract: Eu(NO(3))(3) · 5H(2)O and EuCl(3) · 6H(2)O were allowed to react with bis(diphenylphosphino)alkane dioxides Ph(2)P(O)(CH(2))(n) P(O)Ph(2)(n = 2, 4, 6) to obtain polymeric and binuclear complexes. The prepared compounds were structurally characterized by X-ray diffraction. Luminescence measurements (emission and excitation spectra, quantum yields, lifetimes) were compared with crystallographic data in order to find a relationship between luminescent properties of the Eu(III) complexes and their structures. The Eu(III) polymers, especially [Eu(dpphO(2))(2)Cl(2)](+) Cl(-)}(n), have shown extremely long luminescence lifetimes, up to 3.73 ms, as a result of a highly protecting hydrophobic shield.
authors.affiliation: Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, CZ-62500, Brno, Czech Republic.
authors.forename: Pavla
authors.initials: P
authors.lastname: Pekarkova
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Spichal
authors.forename: Petr
authors.initials: P
authors.lastname: Taborsky
authors.forename: Marek
authors.initials: M
authors.lastname: Necas
mesh_terms: D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008958:Models, Molecular; D010087:Oxides / Q000737:chemistry; D010720:Phosphines / Q000737:chemistry*
chemical_list: D010087:Oxides; D010720:Phosphines; D005063:Europium