title: Efficient red emission from PMMA films doped with 5,6-DTFI europium(III) complexes: synthesis, structure and photophysical properties.
abstract: A new β-diketone, 5,6-dimethoxy-2(2,2,2-trifluoroethyl)-1-indone (5,6-DTFI), has been designed and synthesized. Two series of four 5,6-DTFI Sm(3+) and Eu(3+) complexes, namely, Eu(5,6-DTFI)3(H2O)2 (1), Eu(5,6-DTFI)3(Phen) (2), Sm(5,6-DTFI)3(H2O)2 (3) and Sm(5,6-DTFI)3(Phen) (4) (Phen = 1,10-phenanthroline), have been isolated. X-ray diffraction analysis reveals that all complexes 1-4 are of mononuclear structures. Luminescent and phosphorescent spectra of complexes 1-4 show strong characteristic emissions of the corresponding Eu(3+) and Sm(3+) ions. Upon complexes 1 and 2 were doped into the poly(methylmethacrylate) (PMMA) forming the films, the PMMA polymer matrix acting as a co-sensitizer for Eu(3+) ion enhances the luminescent lifetimes, overall quantum yields and the thermal stability in comparison with the precursor complexes.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P R China.
authors.forename: Weizuo
authors.initials: W
authors.lastname: Li
authors.forename: Pengfei
authors.initials: P
authors.lastname: Yan
authors.forename: Guangfeng
authors.initials: G
authors.lastname: Hou
authors.forename: Hongfeng
authors.initials: H
authors.lastname: Li
authors.forename: Guangming
authors.initials: G
authors.lastname: Li
mesh_terms: D060326:Chemistry Techniques, Synthetic; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013696:Temperature
chemical_list: D007659:Ketones; D008024:Ligands; D009942:Organometallic Compounds; D005063:Europium; D019904:Polymethyl Methacrylate