Abstract
The present work aims to test the validity of the electronic shell model for Au25(SC6H13)18 by monitoring the charge state of the Au:S core and thereby to elucidate the origin of magic stability. Electrospray ionization mass spectrometry revealed that the Schiffrin method yields [Au25(SC6H13)18]x with a distribution of charge states, which shifts toward negative values with reduction time. The stable ions [Au25(SC6H13)18]1+ and [Au25(SC6H13)18]1-can be synthesized by chemical oxidation and reduction of [Au25(SC6H13)18]0, respectively. These findings lead us to conclude that electronic shell closing is not a crucial factor for the high stability of [Au25(SC6H13)18]x (x = 1-, 0, 1+). We ascribe magic stability to the core-in-cage structure predicted theoretically.
Original language | English (US) |
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Pages (from-to) | 11322-11323 |
Number of pages | 2 |
Journal | Journal of the American Chemical Society |
Volume | 129 |
Issue number | 37 |
DOIs | |
State | Published - Sep 19 2007 |
Externally published | Yes |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry