Tangential Ligand-Induced Strain in Icosahedral Au13
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- 作者：Olga Guliamov ; Anatoly I. Frenkel ; Laurent D. Menard ; Ralph G. Nuzzo ; Leeor Kronik
- 刊名：Journal of the American Chemical Society
- 出版年：2007
- 出版时间：September 12, 2007
- 年：2007
- 卷：129
- 期：36
- 页码：10978 - 10979
- 全文大小：55K
- 年卷期：v.129,no.36(September 12, 2007)
- ISSN：1520-5126
文摘
A quantitative comparison of first principles calculations with extended X-ray absorption fine structure and transmission electron microscopy measurements provides strong evidence that Au13 nanocrystals are stabilized in a slightly distorted icosahedral structure by on-top phosphine ligands and a combination of on-top and bridging thiol ligands. Importantly, the ligands change the icosahedral strain (i.e., the radial-tangential bond length ratio) significantly, with the tangential bonds within the Au core exhibiting much more disorder than the radial ones.