配合物Eu_xM_(1-x)(TTA)_3(H_2O)_2(M=La,Gd)光致发光特性  

Photoluminescence of Solid Complexes Eu_xM_(1-x)(TTA)_3(H_2O)_2(M=La,Gd)

作　　者：刘铭钊[1] 杨展澜[1] 张莉[1] 翁诗甫[1] 吴瑾光[1] 

机构地区：[1]稀土材料化学及应用国家重点实验室北京大学化学学院,北京100871

出　　处：《物理化学学报》2001年第9期797-801,共5页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展规划资助项目(G1998061311)

摘　　要：合成了一系列组成为Eu_xM_(1-x)(TTA)_3(H_2O)_2(M=La,Gd)的固体配合物,利用红外光谱和荧光光谱研究了配合物结构和发光性质随Eu^(3＋)浓度的变化规律.红外光谱的结果表明,配合物的成份为Eu_xM_(1-x)(TTA)_3(H_2O)_2和M(TTA)_3(H_2O)_2,没有新化合物生成.而荧光光谱的结果显示配合物的发光强度与Eu^(3＋)浓度不成线性关系,其中不发光的M(TTA)_3组分对发光有增益作用.对其可能的发光机制进行了探讨.A series of solid complexes EuxM1-x(TTA)(3)(H2O)(2) (M = La, GO were synthesized. Their compositions were ensured by the ICP analysis. The FTIR spectroscopy showed that no new compound formed besides Eu(TTA)(3)(H2O)(2) and M(TTA)(3) (H2O)(2)(M = La, Gd) (to see Table 3). The luminescence property of them was investigated by using luminescence spectroscopy. The results indicated that the luminescence intensity of the complexes did not have a linear relation with the concentration of Eu3+. Addition of M3+ (La3+ or Gd3+) enhanced the luminescence of Eu3+. Furthermore, the enhancement by Gd3+ is more remarkable than by La3+. The possible intermolecular energy transfer mechanism was discussed, which explained the phenomena very well.

关 键 词：光致发光 配合物 红外光谱 荧光光谱 能量传递 稀土 TTA 

分 类 号：O641.4[理学—物理化学]