From the data of IR and XPS, it is evident that the donor atom (O, Cl, Br, I, or, N) of each molecule is slightly coordinated with the metal Dy.

• 红外光谱及光电子能谱数据显示:分子中苯甲酸阴离子邻位取代基上的配位原子(O、Cl、Br、I、N)与镝均有微弱的络合现象。