Investigation of Praseodymium Fluorides: A Combined Matrix-Isolation and Quantum-Chemical Study.
Investigation of Praseodymium Fluorides: A Combined Matrix-Isolation and Quantum-Chemical Study.
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氟化镨的研究：基质分离和量子化学的联合研究
DOI：
10.1021/acs.inorgchem.5b01175
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发表时间：
2015
影响因子：
4.6
通讯作者：
S. Riedel
中科院分区：
文献类型：
--
作者：
T. Vent-Schmidt;S. Riedel
镧系元素的化学性质主要由氧化态+III的化合物主导。只有少数Ce、Pr和Tb的化合物是已知的，其金属处于+IV氧化态。在这项工作中，我们通过理论和基质隔离技术，通过激光烧蚀的镨原子与过量的氖，氩，氪，或纯氟中的氟的反应，研究了PrF5分子的稳定性。除了已知的PrF 3分子外，还观察到了未见报道的PrF 4的红外谱带，证明了PrF和PrF 2的形成，但没有证据表明PrF 5的形成。
The chemistry of the lanthanides is mostly dominated by compounds in the oxidation state +III. Only few compounds of Ce, Pr, and Tb are known with the metal in the +IV oxidation state. Removal of the last f-electron on praseodymium +IV would lead to a closed-shell system with formal oxidation state V. In this work we investigated the stability of the PrF5molecule by theory and matrix-isolation techniques through the reaction of laser-ablated praseodymium atoms with fluorine in excess of neon, argon, krypton, or neat fluorine. Besides the known PrF3molecule, unreported IR bands for PrF4could be observed, and there is evidence for the formation of PrF and PrF2but not for the formation of PrF5.