title: Photoluminescence behavior of europium (III) complexes containing 1-(4-tert-butylphenyl)-3-(2-naphthyl)-propane-1,3-dione ligand.
abstract: Three novel europium complexes with 1-(4-tert-butylphenyl)-3-(2-naphthyl)-propane-1,3-dione (TNPD) and 2,2-dipyridine (Bipy) or 1,10-phenan-throline (Phen) were synthesized and confirmed by FT-IR, (1)H NMR, UV-vis absorption and elemental analysis. Photoluminescence behavior of complexes Eu(TNPD)3, Eu(TNPD)3·Bipy and Eu(TNPD)3·Phen were investigated in detail. Their emission spectra exhibited the characteristic emission bands that arise from the (5)D0→(7)FJ (J=0-4) transitions of the europium ion in solid state. Meanwhile, the results of their lifetime decay curves indicated that only one chemical environment existed around the europium ion. The intrinsic luminescence quantum efficiency (η) and the experimental intensity parameters (Ωt) of europium complexes were determined according to the emission spectra and luminescence decay curves in solid state. The complex Eu(TNPD)3·Phen showed much longer lifetime (τ) and higher luminescence quantum efficiency (η) than complexes Eu(TNPD)3 and Eu(TNPD)3·Bipy.
authors.affiliation: Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China. Electronic address: dunjiawang@163.com.
authors.forename: Dunjia
authors.initials: D
authors.lastname: Wang
authors.forename: Chunyang
authors.initials: C
authors.lastname: Zheng
authors.forename: Ling
authors.initials: L
authors.lastname: Fan
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Hu
authors.forename: Jing
authors.initials: J
authors.lastname: Zheng
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry* / Q000378:metabolism; D005063:Europium / Q000737:chemistry* / Q000378:metabolism; D007659:Ketones / Q000737:chemistry* / Q000378:metabolism; D008024:Ligands; D008027:Light; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011407:Propane / Q000737:chemistry* / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D056831:Coordination Complexes; D007659:Ketones; D008024:Ligands; D005063:Europium; D011407:Propane
keywords: Europium (III) complex; Judd−Ofelt intensity parameters; Photoluminescent property; Quantum efficiency; β-Diketone