| Rare-earth organic complexes have attracted much attention.Their appli -cations in laser material,photoluminescenct material and electroluminescent material are very promising.The summary of study and application of rare earth luminescent complexes is in this paper.The synthesis of ternary and fourfold complex of europium,tebium and thenoyltri -fluoroacetone and the doped rare earth coordination compounds of Eu,Tb or Gd and Y and the relation between the composition of doped ions and the luminescent character have been studied.The complexes are characterized by XRD,DTA-TG,IR, UV,fluorescence spectra and Electroluminescence.The main work of this paper lies in:First part,we studied the effect from photoluminescent capability when introduction of Tb3+into the Eu3+complex which the first and the second ligands is HTTA and 2,2-Dipy,respectively.Experiments showed that the mole ratio of Eu3+:Tb3+=1:1 was the best proportion for the fluorescent intensity inλ=613 nm.We utilized CH3Cl as solvent to determine the fluorescence of Tb1-xEux(TTA)3phen and Tb1-xEux(TTA)3Dipy.So,the determined results were quantificational. Second part,we changed rare iron Eu,Tb or Y,Gd,and the first ligand HTTA or N-HPA,m-NBA and 3,5-DNBA and the second ligand 1,10-Phen or 2,2′-Dipy,TPPO so as to compose a series of rare dinuclear complexes Tb1-xEux(TTA)3Phen,Y1-xEux(TTA)3Dipy,Tb1-xEux(m-NBA)3 Phen,Tb1-xEux (TTA)2(N-HPA)Phen and Y1-xEux(TTA)3(TPPO)2.The complexes are charac -terized by XRD,DTA-TG,IR,UV,fluorescence spectra and electrolumine -scence.The effect of rare earth ions on the doped europium complexes is stronger than that of non-doped complexes.When the composition of doped ion is certain,the strongest fluorescence intensity of doped complexes can be attained.It is observed Eu complexes doped Tb or Y,Gd can enhance luminescent intensity,and studies the effect of the different mole ratio of Eu and Tb.When the mole ratio of Eu and Tb or Y,Gd is 1:1,fluorescence intensity is strongest.Third part,novel rare earth fourfold compound of Eu3+doped Tb3+with HTTA,N-HPA and 1,10-Phenanthroline {Tb1-xEux(TTA)2(N-HPA)Phen} had been synthesized and used as emission materials.The characteristics of the compounds have been studied by UV,IR,DTA-TG,XRD and Fluorescence spectroscopy.The complex of Eu(Ⅲ)emits strong red fluorescence when excited by UV light.The experiment result shows the complex is stable,and their photoluminescence and electroluminescence properties were systema -tically studied by using these complexes as emissive materials.TG analysis proved that the complexes are stable up to a temperature of about 200℃. Four part,we(?)tudied that the electroluminescence of Eu comlpexes doped Tb or Y,Gd.The complexes were vaporized onto ITO glass for determination of electroluminescence.In the study,we found that the electro -luminescent intensity of the complexes Tb0.5Eu0.5(TTA)3Dipy,Y0.5Eu0.5 -(TTA)3Dipy,Gd0.5Eu0.5(TTA)3Dipy,Tb0.5Eu0.5(m-N-BA)3Phen,Eu(TTA)2 (N-HPA)Phen,YO.25Eu0.75(TTA)3(TPPO)2,and Tb0.25Eu0.75(TTA)3Phen was better.It is observed not only ligands can transfer energy to Eu,but also Tb3+ or Y3+,Gd3+ion can transfer energy to Eu.Their photoluminescence and electroluminescence properties have been systematically studied,So lumin(?) -scence intensity is enhanced.Five part,we studied that the luminescence intensity of rare earth complexes is stronger by codoping with TiO2,ZnS and CdS.Thus,it can be expected that nano-TiO2 or ZnS,CdS material play an important role in improving luminescent intensity of lanthanide complex.Their photo -luminescence and electroluminescence properties have been systematically studied,luminescence intensity is enhanced.The experimert result shows the complex is stable,and discussed these complexes energy transfer.In conclusion,the luminescent characteristics of these complexes are so well that has a good forground.In addition,based on those results,a series of new rare earth complexes could be designed and synthesized to optimize the luminescent properties of these lanthanide ions.It can be used to design new organic electroluminescence materials.
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