Substituent effects on redox potentials and optical gap energies of molecule-like Au38(SPhX)24 nanoparticles

被引：136

作者：

Guo, R ^{[1
]}

Murray, RW ^{[1
]}

机构：

[1] Univ N Carolina, Kenan Labs Chem, Chapel Hill, NC 27599 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2005年 / 127卷 / 34期

关键词：

D O I：

10.1021/ja053119m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A molecule-like substituent effect on redox formal potentials in the nanoparticle series Au-38(SPhX)(24) has been discovered. Electron-withdrawing "X" substituents energetically favor reduction and disfavor oxidation, and give formal potentials that correlate with Hammett substituent constants. The ligand monolayer of the nanoparticles is shown, thereby, to play a strong role in determining electronic energies of the nanoparticle core and is more than simply a protecting or capping layer. The substituent effect does not, however, detectably change the HOMO-LUMO gap energy, being identical for the HOMO and LUMO levels and presumably inductive in nature.

引用

页码：12140 / 12143

页数：4

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