系列Ln(Ⅲ)-羧基二聚物的电子光谱研究(Ln=Nd,Sm,Eu)

Study on Electron Spectra of the Series of Ln(Ⅲ)-carboxylates Dimmers(Ln=Nd,Sm,Eu)

报道了自合成的 3种含 L n3 +的二聚物晶体 N d2 ( CH3 COO) 4( ONO2 ) 2 ( C12 H8N2 ) 2 ( A) ,Sm2 ( C6H5COO) 6( C12H8N2 ) 2 ( B) ,Eu2 ( C6H5COO) 6( C12 H8N2 ) 2 ( C)的 U V -VIS-NIR光谱数据 ,依据 L n3 + 能级图以及相应光谱项和选律 ,对各谱带进行了分析指认 ,并通过与 L n3 + 离子和简单化合物 L n( NO3 ) 3 · 6H2 O光谱的对比 ,讨论了配位场对二聚物中L n3 +的 f-f跃迁影响 .

The data of electron spectra are reported for the following three Ln(Ⅲ)-carboxylates dimmers:Nd 2(CH 3COO) 4 (ONO 2) 2(C 12H 8N 2) 2(A),Sm 2(C 6H 5C OO) 6(C 12H 8N 2) 2(B),Eu 2(C 6H 5COO) 6(C 12H 8N 2) 2(C).According to the energy level diagra ms,the spectrum terms of the ground state and excited states and the selection r ule of the Ln- 3+,all the spectrum bands were analyzed,assigned and liste d in this paper.With comparing with the Ln- 3+ and Ln(NO 3) 3·6H 2O,the affect of the ligand field to the f-f transitions of the Ln- 3+ is discussed.