Photoacoustic Spectral Analysis of f-f Transitions of Neodymium Compounds with TFA and HFA  

作　　者：杨跃涛 苏庆德 赵贵文 

出　　处：《Journal of Rare Earths》1998年第4期2-7,共6页稀土学报（英文版）

摘　　要：The photoacoustic(PA) spectra of neodymium oxide, Nd 2O 3(A type), and trisfluoroacetylactone(TFA) and hexafluoroacetylactone(HFA) neodymium complexes, Nd(TFA) 3·2H 2O and Nd(HFA) 3·2H 2O, are reported. The nephelauxetic ratio β , bonding parameter b 1/2 , and Sinha parameter δ were calculated based on their PA spectra. The variation of these parameters and correlation of them with the nature of metal ligand bonding were discussed. The intensity analysis of PA bands of f f transitions of neodymium ion was carried out by calculating the intensity branching vector and the environmental effects on the f f transitions of neodymium ion were discussed also. The branching vectors of f f transition of Nd(TFA) 3·2H 2O and Nd(HFA) 3·2H 2O are similar, which indicates the perturbation of the two ligand fields is similar. As the oscillator strength of the hypersensitive transition increases, the branching vector exhibits a corresponding increase. The PA spectra provide a new tool for the study of the interaction between Ln 3+ ions and the environment.The photoacoustic(PA) spectra of neodymium oxide, Nd 2O 3(A type), and trisfluoroacetylactone(TFA) and hexafluoroacetylactone(HFA) neodymium complexes, Nd(TFA) 3·2H 2O and Nd(HFA) 3·2H 2O, are reported. The nephelauxetic ratio β , bonding parameter b 1/2 , and Sinha parameter δ were calculated based on their PA spectra. The variation of these parameters and correlation of them with the nature of metal ligand bonding were discussed. The intensity analysis of PA bands of f f transitions of neodymium ion was carried out by calculating the intensity branching vector and the environmental effects on the f f transitions of neodymium ion were discussed also. The branching vectors of f f transition of Nd(TFA) 3·2H 2O and Nd(HFA) 3·2H 2O are similar, which indicates the perturbation of the two ligand fields is similar. As the oscillator strength of the hypersensitive transition increases, the branching vector exhibits a corresponding increase. The PA spectra provide a new tool for the study of the interaction between Ln 3+ ions and the environment.

关 键 词：Rare earths Photoacoustic spectroscopy NEODYMIUM f  f transitions 

分 类 号：TQ133.3[化学工程—无机化工]