摘要
合成了几种新型的轻稀土2,5-噻吩二羧酸-1,10-菲咯啉的三元配合物,通过元素分析、热分析、红外光谱法确定其组成为Ln_2(L)_3(phen)_2·nH_2O(Ln=La,n=2;Ln=Sm,Eu,Gd,n=4)。重点研究了铕配合物的荧光性能,并测定其荧光寿命为0.83 ms。另以Gd^(3+)配合物为模型化合物,通过低温磷光光谱确定了2,5-噻吩二羧酸配体的三重态能级为18200 cm^(-1),并通过低温磷光寿命的测定详细讨论了有机配体之间的分子内能量传递机制和效率。
A series of novel ternary complexes of light rare earths with thiophene -2,5 - dicarboxylic acid （ H2L） and 1, 10 - phenanthroline were synthesized and characterized by elemental analysis, TG - DTA and FTIR spectra. The compositions of the complexes were confirmed to be Ln2 （L） 3 （phen） 2 · nH2O （ Ln = La, n = 2; Ln = Sm, Eu, Gd, n = 4）. The fluorescence properties of Eu2 （ L ） 3 （phen） 2· 4H2O were specially studied, and the measured fluorescence lifetime was 0.83 ms. The low-est triplet state energy of H2 L was determined to be 18200 cm -i by measuring the phosphorescence spectra of their correspond- ing gadolinium complexes as model compounds. The mechanism and eftieieney of intramoleeular energy transfer between lig- ands were discussed in detail.
出处
《稀土》
EI
CAS
CSCD
北大核心
2011年第4期8-13,共6页
Chinese Rare Earths
基金
教育部春晖计划基金资助(Z2006-1-52007)
贵州省科技厅科技基金项目资助(黔科合J字(2005)2008号)
关键词
稀土
2
5-噻吩二羧酸
1
10-菲咯啉
配合物
谱学性质
rare earth
thiophene - 2,5 - dicarboxylic acid
1, 10 - phenanthroline
complex
spectroscopic property
