期刊
CHEMPHYSCHEM
卷 8, 期 1, 页码 157-161出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200600524
关键词
chemical reactivity; density functional calculations; gold photoelectron spectroscopy; structure elucidation
Ground-state structures and other experimentally relevant isomers of Au-15(-) to Au-24(-) clusters are determined through joint first-principles density functional theory and photoelectron spectroscopy measurements. Subsequent calculations of molecular O-2 adsorption to the optimal cluster structures reveal a size-dependent reactivity pattern that agrees well with earlier experiments. A detailed analysis of the underlying electronic structure shows that the chemical reactivity of the gold cluster anions can be elucidated in terms of a partial-jellium picture, where delocalized electrons occupying electronic shells move over the ionic skeleton, whose geometric structure is strongly influenced by the directional bonding associated with the highly localized d-band electrons.
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