Firstly, the annular dimer [CdL_2(H_2O)_2]_2 was synthesized ay the room temperature, and characterized by single X-ray crystallography.

• 首先,我们合成了具有轮状结构的二聚体[CdL_2(H_2O)_2]_2,它的结构具有很好的对称性。