SATELLITE STRUCTURE IN X-RAY PHOTOELECTRON-SPECTRA OF SOME BINARY AND MIXED OXIDES OF LANTHANUM AND CERIUM
SATELLITE STRUCTURE IN X-RAY PHOTOELECTRON-SPECTRA OF SOME BINARY AND MIXED OXIDES OF LANTHANUM AND CERIUM
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DOI：
10.1039/dt9760001686
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发表时间：
1976-01-01
期刊：
影响因子：
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通讯作者：
THORNTON, G
中科院分区：
文献类型：
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作者：
BURROUGHS, P;HAMNETT, A;THORNTON, G
芯电子X射线光电子（X-p.e.）本文报道了La_2 O_3、LaMO_3（M = Fe和Co）、CeO_2和BaCeO_3等f0化合物的光谱。为了比较，包括了螯合物物种[La（tmhd）3]和[Ce（tmhd）4]（tmhd = 2，2，6，6-四甲基庚烷-3，5-二酮）的结果。已采取特殊预防措施，以确保样品的最佳表面纯度。卫星结构已被观察到的4p，除了3d和4d，信号在镧（III）和铈（IV）的化合物。这些卫星讨论的电荷转移类型的共激发，主要是O 2 p →金属4f过渡。在铈（IV）氧化物的卫星显然是由于能量增益（代表“安定”），而不是能量损失（震荡）的过程。
A study of the core-electron X-ray photoelectron (X-p.e.) spectra of the f0 compounds La2O3, LaMO3(M = Fe and Co), CeO2, and BaCeO3 is described. Results on the chelate species [La(tmhd)3] and [Ce(tmhd)4](tmhd = 2,2,6,6-tetramethylheptane-3,5-dionato) are included for comparison. Special precautions have been taken to ensure an optimal degree of surface purity of the samples. Satellite structure has been observed for the 4p, in addition to the 3d and 4d, signals in both the lanthanum(III) and cerium(IV) compounds. These satellites arc discussed in terms of coexcitations of the charge-transfer type, principally O 2p→ metal 4f transitions. In the cerium(IV) oxides the satellites are apparently due to energy-gain (representing ‘ shake-down ’) rather than energy-loss (shake-up) processes.