4.7 Article

Distinctive Characteristics of Al7Li: A Superatom Counterpart of Group IVA Elements

Journal

INORGANIC CHEMISTRY
Volume 59, Issue 19, Pages 14093-14100

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c01871

Keywords

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Funding

  1. National Natural Science Foundation of China [21573089, 51872057]
  2. 13th Five-Year Science and Technology Research Project of Jilin provincial education department [JJKH20190117KJ]
  3. Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [201802097, 2019L0745]
  4. Datong Applied Basic Research [2019166]
  5. Open Project of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University [2020-15]

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A new superatom of dual valence states, namely Al7Li, has been proposed to further enrich the three-dimensional periodic table. It bears great resemblance to group IVA elements in many aspects. Chief among them is that Al7Li favors both +2 and +4 oxidation states, which makes it analogous to the heavier carbon-group elements. Al7Li is capable of forming stable ionic compounds with carbon, oxygen, and fluorine and forming covalent tetrahydride with hydrogen, just as how germanium, tin, and lead atoms combine with these elements to form stable molecules. The nearest atomic counterpart of Al7Li in group IV is probably Sn or Pb since their oxides and tetrahydrides share like characteristics.

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