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Article (Scientific journals)
The magic gold cluster AU(20)
Kryachko, Eugène; Remacle, Françoise
2007In International Journal of Quantum Chemistry, 107 (14), p. 2922-2934
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Abstract :
[en] The 20-nanogold cluster Au-20 exhibits a large variety of two- and three-dimensional isomeric forms. Among them is the ground-state isomer Au-20(T-d) representing the stable cluster with a unique tetrahedral shape, with all atoms on the surface, and large HOMO-LUMO gap which even slightly exceeds that of the buckyball fullerene C-60. The anionic cluster Au-20(-) (T-d) that holds its parent tetrahedral symmetry features a high catalytic activity. The list of the properties of the 20-nanogold clusters surveyed in the present work ranges from the energetic order of stability of its isomers to the optical absorption and excitation spectra of the Au-20(T-d) cluster. We also report the structures and properties of its doubly charged clusters Au-20(2+) and Au-20(2-) and computationally confirm that Au-20 is indeed stable. The zero-point-energy-corrected adiabatic second electron affinity of Au-20(T-d) amounts to 0.43-0.53 eV that is consistent with the experimental data. In addition, we provide computational evidence of the existence of the novel, hollow cage isomer of Au-20 and analyze its key properties. (C) 2007 Wiley Periodicals, Inc.
Disciplines :
Chemistry
Author, co-author :
Kryachko, Eugène ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de chimie physique théorique
Remacle, Françoise  ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de chimie physique théorique
Language :
English
Title :
The magic gold cluster AU(20)
Publication date :
2007
Journal title :
International Journal of Quantum Chemistry
ISSN :
0020-7608
eISSN :
1097-461X
Publisher :
John Wiley & Sons, Inc, Hoboken, United States - New Jersey
Volume :
107
Issue :
14
Pages :
2922-2934
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 January 2010

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