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Toward the Solution Synthesis of the Tetrahedral Au20 Cluster
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Section:Abstract
We report the observation in solution of the recently discovered tetrahedral Au20 cluster coordinated with eight PPh3 (Ph = phenyl) ligands. The composition and molecular weight of the Au20(PPh3)8 complex were confirmed by the isotopic pattern and accurate mass measurement of its doubly charged cation using high-resolution mass spectrometry. A collision-induced dissociation experiment showed that four PPh3 ligands can be easily removed from Au20(PPh3)82+, resulting in a highly stable Au20(PPh3)42+ ion. This observation is consistent with the tetrahedral Au20, in which the four apex sites are expected to bond to the PPh3 ligands strongly, and is confirmed by theoretical calculations that predict a highly stable Au20(PH3)4 complex with Au−PH3 bond energies of 
1 eV. The current experimental and theoretical observations suggest that large quantities of ligand-stabilized tetrahedral Au20 can be obtained, opening the door for exploring its anticipated novel chemical, optical, and catalytic properties.
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This article has been cited by 25 ACS Journal articles (5 most recent appear below).
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Initial Growth Mechanisms of Gold-Phosphine Clusters
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Emilie B. Guidez, Allison Hadley, and Christine M. AikensThe Journal of Physical Chemistry C2011 115 (14), 6305-6316Gold-phosphine cluster growth was studied at the BP86/TZV level of theory, starting from the precursor AuClPR3 (R = H, Me, and Ph), up to clusters containing four gold atoms. For all three substituents, AuClPR3 is linear. For R = H and R = Me, the anionic ...
Novel Pathways for Enhancing Nonlinearity of Organics Utilizing Metal Clusters
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Zilvinas Rinkevicius, Jochen Autschbach, Alexander Baev, Mark Swihart, Hans Ågren and Paras N. PrasadThe Journal of Physical Chemistry A2010 114 (28), 7590-7594We show that ultrasmall metallic nanoparticles can be combined with large second- and third-order response organic chromophores to enhance the overall third-order response of the system. This approach can be used in combination with microscopic cascading ...
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History
- Published In Issue August 19, 2004
- Received March 28, 2004
Revised April 27, 2004
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