Pentavalent Lanthanide Compounds: Formation and Characterization of Praseodymium(V) Oxides

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• 作者：Qingnan Zhang ; Dr. Shu-Xian Hu ; Hui Qu ; Dr. Jing Su ; Dr. Guanjun Wang ; Jun-Bo Lu ; Dr. Mohua Chen ; Prof. Dr. Mingfei Zhou and Prof. Dr. Jun Li
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：June 6, 2016
• 年：2016
• 卷：55
• 期：24
• 页码：6896-6900
• 全文大小：1110K
• ISSN：1521-3773

文摘

The chemistry of lanthanides (Ln=La–Lu) is dominated by the low-valent +3 or +2 oxidation state because of the chemical inertness of the valence 4f electrons. The highest known oxidation state of the whole lanthanide series is +4 for Ce, Pr, Nd, Tb, and Dy. We report the formation of the lanthanide oxide species PrO₄ and PrO₂⁺ complexes in the gas phase and in a solid noble-gas matrix. Combined infrared spectroscopic and advanced quantum chemistry studies show that these species have the unprecedented Pr^V oxidation state, thus demonstrating that the pentavalent state is viable for lanthanide elements in a suitable coordination environment.