title: Fluorescence enhancement of europium (III) perchlorate by 1,10-phenanthroline on the 1-(naphthalen-2-yl)-2-(phenylsulthio)ethanone complex and luminescence mechanism.
abstract: A novel ligand, 1-(naphthalen-2-yl)-2-(phenylsulthio)ethanone was synthesized using a new method and its two europium (Eu) (III) complexes were synthesized. The compounds were characterized by elemental analysis, coordination titration analysis, molar conductivity, infrared, thermo gravimetric analyzer-differential scanning calorimetry (TGA-DSC), (1)H NMR and UV spectra. The composition was suggested as EuL5 · (ClO4)3 · 2H2O and EuL4 · phen(ClO4)3 · 2H2O (L = C(10)H(7)COCH(2)SOC(6)H(5)). The fluorescence spectra showed that the Eu(III) displayed strong characteristic metal-centered fluorescence in the solid state. The ternary rare earth complex showed stronger fluorescence intensity than the binary rare earth complex in such material. The strongest characteristic fluorescence emission intensity of the ternary system was 1.49 times as strong as that of the binary system. The phosphorescence spectra were also discussed.
authors.affiliation: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors.forename: Wen-Xian
authors.initials: WX
authors.lastname: Li
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Xin
authors.forename: Shu-Yan
authors.initials: SY
authors.lastname: Feng
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Bo-Yang
authors.initials: BY
authors.lastname: Ao
authors.forename: Ying-Jie
authors.initials: YJ
authors.lastname: Li
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D015394:Molecular Structure; D010618:Phenanthrolines / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D010618:Phenanthrolines; D005063:Europium; C025205:1,10-phenanthroline
keywords: 1-(naphthalen-2-yl)-2-(phenylsulthio)ethanone; europium complexes; fluorescence enhancement; phosphorescence