期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 24, 页码 6896-6900出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602196
关键词
infrared photodissociation spectroscopy; lanthanides; matrix isolation; oxidation state; praseodymium
资金
- Ministry of Science and Technology of China [2013CB834603, 2012YQ220113-3]
- National Natural Science Foundation of China [21433005, 91426302, 21590792, 21571185]
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.
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