Disclosed is a rare-earth complex including a rare-earth ion, and a ligand coordinate-bonded to the rare-earth ion and having a condensed polycyclic aromatic group. The condensed polycyclic aromatic group is a residue formed by removing a hydrogen atom bonded to a condensed aromatic ring from a condensed polycyclic aromatic compound represented by the following Formula (I).
In Formula (I), R
1
and R
2
represent hydrogen atoms or groups which are bonded to each other to form one aromatic ring or a condensed aromatic ring including two or more aromatic rings.
本发明涉及一种稀土络合物,包括稀土离子和
配体,
配体以配位键与稀土离子结合,并具有紧凑多环芳香基团。所述紧凑多环芳香基团是由从以下式(I)所表示的紧凑多环芳香化合物中去除结合在紧凑芳香环上的
氢原子形成的残基。
在式(I)中,R1和R2表示与彼此相连形成一个芳香环或包括两个或更多芳香环的紧缩芳香环的
氢原子或基团。