硝酸稀土蛋氨酸配合物的光谱研究

The Spectral Studies on RE(NO_3)_3-Methionine Complexes

制备了组成为RE(Met)_4(NO_3)_3·4H_2O(RE=La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Er,Y;Met=DL=Methionene)的固体配合物.研究了它们的红外光谱、紫外光谱和荧光光谱.结果表明,RE^(3+)与蛋氨酸羰基的氧原子配位;配合物的紫外最大吸收都在200nm处;铈和镨的配合物分别在350nm和240nm处有荧光(λ_(ex)=200nm),且属于m^(?)→m型发光。

The Solid complexes, RE(Mct)4(NO3)3 · 4H2O(RE=La,Ce,Pr,Nd,Sm,Eu, Gd,Tb,Dy,Er,Y; Met = Methionine) have been prepared. The IR,UV and FS spectra have been studied. The IR spectra reveal the carboxyl oxygen a torn from group of methionine coordinates to RE(Ⅲ) ions. The maximum UV absorption on the spectral of every complex is at 200 nm. The complexes of Ce and Pr under excitation by 200 nm light emit fluorescence at 350 nm and 240 nm. The result shows that the fluorescence can considered to be m →m type.