A rare earth ternary complex represented by the following formula (1):
wherein M is a rare earth atom; n1 is 2 or 3; n2 is 2, 3, or 4; Rf
1
and Rf
2
are the same or different and are each a aliphatic group having 1 to 22 carbon atoms and containing no hydrogen atoms, an aromatic group containing no hydrogen atoms, or an aromatic heterocyclic group containing no hydrogen atoms; and Z is a ligand containing X, phosphorus, or nitrogen.
由下式(1)表示的稀土三元络合物:
其中 M 是稀土原子;n1 是 2 或 3;n2 是 2、3 或 4;Rf
1
和 Rf
2
相同或不同,且各自是具有 1 至 22 个碳原子且不含氢原子的脂肪族基团、不含氢原子的芳香族基团或不含氢原子的芳香杂环基团;以及 Z 是含有 X、
磷或氮的
配体。