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本文从测定11个稀土乙酰丙酮-α、β、γ、δ-四苯基卟啉络合物的红外和拉曼光谱中发现,由于四苯基卟啉与稀土离子络合,削弱了乙酰丙酮环上的M—O拉伸振动带,使此带向低波数位移,而且仍符合镧系的“四分组”和“斜W”效应,吡咯C—H摇摆振动～984cm~(-1)带亦基本符合此效应,络合物中PN—H拉伸振动带消失,出现M—N拉伸振动与卟啉环骨架振动等的复合振动带,因而上述的镧系变化规律消失.
In this paper, IR and Raman spectra of 11 rare earth acetylacetone-α, β, γ, δ-tetraphenylporphyrin complexes were determined. It was found that due to the complexation of tetraphenylporphyrin with rare earth ions, The M-O stretching band on the ring displaces this band to a low wavenumber, and still complies with the lanthanide “quadruple” and “oblique W” effects. The pyrrole C-H oscillates ~ 984 cm -1 The results also basically accord with this effect. The stretching vibration band of PN-H in the complex disappears, and the complex vibrational band of M-N tensile vibration and the vibration of porphyrin ring skeleton appears. Therefore, the variation law of lanthanum is disappeared.