Studies On Synthesis And Fluorescent Property Of Rare Earth Complex With The Ligand Anthracenyl-methyl-propanedione

In order to obtain the rare earth complexes with high luminous efficiency, a kind of newβ-diketone ligand 1-(9-anthracenyl)-3-methyl-1,3-propanedione (EN) was designed and synthesized. Two new binary rare earth complexes and four new ternary rare earth complexes were obtained by the reaction of rare earth chloride with the newβ-diketone or the newβ-diketone and 1,10-Phenanthroline(Phen) ligands. The fluorescence properties of the rare earth complexes and the newβ-diketone were characterized by means of fluorescent spectra.The work in this dissertation is as follows:1. The newβ-diketone ligand, 1-(9-anthracenyl)-3-methyl-1,3-propanedione (EN), was synthesized by the Claisen condensation reaction. The composition and structure of the newβ-diketone ligand were characterized by elemental analysis, FT-IR, 1HNMR.2. Two binary rare earth complexes RE(EN)2·2H2O were synthesized by the reaction of rare earth chloride RECl3 (RE=Eu3+,Yb3+ ) with 1-(9-anthracenyl)-3-methyl-1,3- propanedione (EN) in alcohol solution. The composition and heat stability of the complexes were determined by means of elemental analysis, FT-IR and TG-DTA.3. Four ternary rare earth complexes RE(EN)2Phen·nH2O were synthesized by the reaction of rare earth chloride RECl3 (RE=Eu3+,Tb3+,Sm3+,Yb3+) with 1,10-Phenanthroline(Phen) and 1-(9-anthracenyl)-3-methyl-1,3-propanedione (EN) in alcohol solution. The composition and heat stability of the complexes were characterized by means of elemental analysis, FT-IR and TG-DSC.4. Fluorescence properties of the complexes have been studied by fluorescent spectra. The results show that the rare earth (Eu, Sm, Yb) complexes can emit special fluorescent spectra of rare earth ions (Eu3+, Sm3+,Yb3+). However, the rare earth Tb complex can not emit the special fluorescent spectra of rare earth ions (Tb3+).5. Compared to luminescence intensity of the complexes, the fluorescence excitatinon and emission spectra of two complexes Eu(EN)2·2H2O and Eu(EN)2Phen·3H2O have been studied at the same experiment condition. The results show two complexes can emit special fluorescent spectra of rare earth ions (Eu3+), but the luminescence intensity of the complex Eu(EN)2Phen·3H2O is stronger than that of the complex Eu(EN)2·2H2O.