期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 104, 期 37, 页码 14565-14569出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0706613104
关键词
alanes; cluster-assembled materials; magic clusters; oxygen etching
The formation and oxygen etching of AlnHm- clusters are characterized in a flow reactor experiment with first-principles theoretical investigations to demonstrate the exceptional stability of Al4H7-. The origin of the preponderance of Al4H7- in the mass spectra of hydrogenated aluminum anions and its resistance to 02 etching are discussed. Al4H7- is shown to have the ability to bond with ionic partners to form stable hydrides through addition of an alkali atom [XAl4H7 (X = Li-Cs)]. An intuitive model that can predict the existence of stable hydrogenated cluster species is proposed. The potential synthetic utility of the superatom assemblies built on these units is addressed.
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