摘要
在77K测定了晶粉状Eu(Ⅲ)-TTA-碱三元配合物的精细荧光光谱。并应用群论方法及跃迁选律结合实验测得荧光光谱中各f-f能级跃迁对应的谱峰的分裂数目,推断出各三元配合物中Eu(Ⅲ)所处近邻的点对称性。
Eu(TTA)_3 nS(nS=2H_2O,2TPPO,Phen,Dpy)and E(uTTA_4)^-(Q)^+(Q=PipH,Et_4N,DBGH)were ynthesized and their high resolution emission spectra were examined at 77 Kin icrocrystals.The umber of Stark splitting of the ~5D_0→~7F_(0,12,4) transition for the four EuTTA_3 Sn omplexes are 1,3,5,9.The site symetryof Eu(Ⅲ)in these four complexes was inferred to be C_,C_,C_s and C_s from theknown crystal structure of the related complexes.While,the number of tarksplitting of ~5D_0→~7F_(0,1,2,4) transition for the three(EuTTA_4)^-(Q)^+ complexes are0,2,2,5;1,2,2,4 and 1,3,4,5 respectively.Thus,the site symetry of Eu(Ⅲ)in thesethree omplexes was inferred to be D_2d,D_(4v) and C_(2v) respectively,from comparisonwith the data f 5Do→~7F_(J) transition of f^6 configuration in 32 point groupsand the known crystal structure he related complexes.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
1991年第4期119-124,共6页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金
长春物理所激发态物理开放实验室资助
关键词
稀土配合物
铕
荧光光谱
点对称性
europium
fine fluorescence spectra
number of Stark splitting ot f-f electronic transition
site symetry
