Organo–Zintl Clusters [P7R4]: A New Class of Superalkalis

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• 作者：Santanab Giri ; G. N. Reddy ; Puru Jena
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2016
• 出版时间：March 3, 2016
• 年：2016
• 卷：7
• 期：5
• 页码：800-805
• 全文大小：417K
• ISSN：1948-7185

文摘

Zintl ions composed of Group 13, 14, and 15 elements are multiply charged cluster anions that form the building blocks of the Zintl phase. Superalkalis, on the other hand, are cationic clusters that mimic the chemistry of the alkali atoms. It is, therefore, counterintuitive to expect that Zintl anions can be used as a core to construct superalkalis. In this paper, using density functional theory, we show that this is indeed possible. The results are compared with calculations at the MP2 level of theory. A systematic study of a P₇^3– Zintl core decorated with organic ligands [R = Me, CH₂Me, CH(Me)₂ and C(Me)₃] shows that the ionization energies of some of the P₇R₄ species are smaller than those of the alkali atoms and hence can be classified as superalkalis. This opens the door to the design and synthesis of a new class of superalkali moieties apart from the traditional ones composed of only inorganic elements.