title: Fluorescence enhancement of rare earth Tb(III) by Tm(III) in benzyl benzoylmethyl sulphoxide complexes.
abstract: A series of rare earth complexes [(Tb(x) Tm(y))L5 (ClO4)2](ClO4)·3H(2) O (x:y = 1.000:0.000, 0.999:0.001, 0.995:0.005, 0.990:0.010, 0.950:0.050, 0.900:0.100, 0.800:0.200, 0.700:0.300; L = C(6) H5 CH2 SOCH2 COC6 H5) (Tb(III) luminescence ion; Tm(III) doped inert ion) were synthesized and characterized by elemental analysis, infrared spectra (IR) and (1) H-NMR. The photophysical properties of these complexes were studied in detail using ultraviolet absorption spectra, fluorescent spectra and lifetimes. The fluorescence spectra of complexes indicated that the fluorescence emission intensity was significantly enhanced by Tm(III). The complexes showed the best luminescence properties when the mole ratio Tb(III):Tm(III) was 0.990:0.010. The fluorescence intensity could be increased to 390%. Additionally, phosphorescence spectra and the luminescence mechanisms are discussed.
authors: College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, People's Republic of China.
authors: Wen-Xian
authors: WX
authors: Li
authors: Wen-Juan
authors: WJ
authors: Chai
authors: Yu
authors: Y
authors: Liu
authors: Ying-Jie
authors: YJ
authors: Li
authors: Tie
authors: T
authors: Ren
authors: Jing
authors: J
authors: Zhang
authors: Bo-Yang
authors: BY
authors: Ao
mesh_terms: D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013454:Sulfoxides / Q000737:chemistry; D013725:Terbium / Q000737:chemistry*; D013932:Thulium / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D013454:Sulfoxides; D013725:Terbium; D013932:Thulium