Conversion of anionic [Au25(SCH2CH2Ph)18]- cluster to charge neutral cluster via air oxidation

被引：392

作者：

Zhu, Manzhou ^{[1
]}

Eckenhoff, William T. ^{[2
]}

Pintauer, Tomislav ^{[2
]}

Jin, Rongchao ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA

[2] Duquesne Univ, Dept Chem & Biochem, Pittsburgh, PA 15282 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 37期

关键词：

D O I：

10.1021/jp805786p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report a solution-phase conversion process of the [Au-25(SCH2CH2Ph)(18)](-) anionic cluster into a charge neutral cluster [Au-25(SCH2CH2Ph)(18)](0) via air oxidation. The one-electron loss of the Au-25(-) cluster and conversion to Au-25(0) is a surprise in light of the chemical inertness of gold nanoparticles. In contrast with the crystal structure of the anion Cluster Au-25(-), which exhibits apparent structural distortions in the Au25S18 framework, such distortions are not observed in the neutral cluster. The cluster charge effect is also manifested in the optical absorption spectra of the clusters. Given the only recently reported structure of the parent Au-25(-) cluster, it is of substantial interest whether its one-electron oxidized product is similar to that of Au-25(-). This work unambiguously determined the structure of the one-electron oxidized product and correlates the structure with the optical properties.

引用

页码：14221 / 14224

页数：4

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