Study on F-F Transitions of Powdered Neodymium Compounds by Photoacoustic Spectroscopy
来源期刊：JOURNAL OF RARE EARTHS2002年第1期
论文作者：赵贵文 杨跃涛 张淑仪 苏庆德
Key words：rare earths; photoacoustic spectroscopy; neodymium; f-f transition; oscillator strength;
Abstract: Photoacoustic (PA) spectra of powdered neodymium oxide (Nd2O3 (A type)), neodymium hydrated chloride (NdCl3*6H2O) and neodymium fluoride (NdF3) were reported. PA band shifts as compared to their positions in aqueous Nd3+ are used to calculate the nephelauxetic parameters of the compounds. The variation of these parameters and correlation with the nature of metal-ligand bonding were discussed. A novel method is introduced to determine the relative values of oscillator strengths and Judd-Ofelt parameters of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of τ2 and oscillator strengths of hypersensitive transitions of the title compounds. It is hopetul that the new method of PA technique may serve for the Judd-Ofelt quantitative analysis of powdered rare earth compounds.
赵贵文1，杨跃涛2，张淑仪2，苏庆德1
(1.Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;
2.State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China)
Abstract:Photoacoustic (PA) spectra of powdered neodymium oxide (Nd2O3 (A type)), neodymium hydrated chloride (NdCl3*6H2O) and neodymium fluoride (NdF3) were reported. PA band shifts as compared to their positions in aqueous Nd3+ are used to calculate the nephelauxetic parameters of the compounds. The variation of these parameters and correlation with the nature of metal-ligand bonding were discussed. A novel method is introduced to determine the relative values of oscillator strengths and Judd-Ofelt parameters of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of τ2 and oscillator strengths of hypersensitive transitions of the title compounds. It is hopetul that the new method of PA technique may serve for the Judd-Ofelt quantitative analysis of powdered rare earth compounds.
Key words:rare earths; photoacoustic spectroscopy; neodymium; f-f transition; oscillator strength;
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