Chiral Thiol-Stabilized Silver Nanoclusters with Well-Resolved Optical Transitions Synthesized by a Facile Etching Procedure in Aqueous Solutions

被引：145

作者：

Cathcart, Nicole ^{[1
]}

Mistry, Pretesh ^{[1
]}

Makra, Christy ^{[1
]}

Pietrobon, Brendan ^{[1
]}

Coombs, Neil ^{[2
]}

Jelokhani-Niaraki, Masoud ^{[1
]}

Kitaev, Vladimir ^{[1
]}

机构：

[1] Wilfrid Laurier Univ, Dept Chem, Waterloo, ON N2L 3C5, Canada

[2] Univ Toronto, Dept Chem, Ctr Nanostruct Imaging, Toronto, ON M5S 3H6, Canada

来源：

LANGMUIR | 2009年 / 25卷 / 10期

基金：

加拿大创新基金会;

关键词：

GOLD CLUSTERS; NANOPARTICLES; ORIGIN; SIZE; AU;

D O I：

10.1021/la9005967

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel approach of cyclic reduction in oxidative conditions has been developed to prepare a single dominant species of chiral thiol-stabilized silver nanoclusters (AgNCs). Such AgNCs, which are stable in solution for up to a few days, have been obtained for the First time. The generality of the established procedure is proven by using several enantiomeric water-soluble thiols, including glutathione, as protective ligands. The prepared AgNCs featured prominent optical properties including a single pattern of UV-vis absorption with well-resolved peaks. The chirality of the clusters has been investigated by circular dichroism (CD) spectroscopy. CD spectra displayed strong characteristic signatures in the visible range. Tentative identification of the cluster composition is discussed.

引用

页码：5840 / 5846

页数：7

共 28 条

[1] Origin of Discrete Optical Absorption Spectra of M25(SH)18- Nanoparticles (M = Au, Ag) [J].