Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield

被引：300

作者：

Soldan, Giada ^{[1
]}

Aljuhani, Maha A. ^{[1
]}

Bootharaju, Megalamane S. ^{[1
]}

AbdulHalim, Lina G. ^{[1
]}

Parida, Manas R. ^{[1
]}

Emwas, Abdul-Hamid ^{[2
]}

Mohammed, Omar F. ^{[1
]}

Bakr, Osman M. ^{[1
]}

机构：

[1] King Abdullah Univ Sci & Technol, Solar & Photovolta Engn Res Ctr, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia

[2] King Abdullah Univ Sci & Technol, Imaging & Characterizat Core Lab, Thuwal 239556900, Saudi Arabia

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 19期

关键词：

coordination modes; nanoalloys; nanoclusters; photoluminescence; supramolecular chemistry; ELECTRON-TRANSFER; AU-25; CLUSTERS; NANOPARTICLES; GLUTATHIONE;

D O I：

10.1002/anie.201600267

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A high quantum yield (QY) of photoluminescence (PL) in nanomaterials is necessary for a wide range of applications. Unfortunately, the weak PL and moderate stability of atomically precise silver nanoclusters (NCs) suppress their utility. Herein, we accomplished a 26-fold PL QY enhancement of the Ag-29(BDT)(12)(TPP)(4) cluster (BDT: 1,3-benzenedithiol; TPP: triphenylphosphine) by doping with a discrete number of Au atoms, producing Ag29-xAux(BDT)(12)(TPP)(4), x=1-5. The Au-doped clusters exhibit an enhanced stability and an intense red emission around 660nm. Single-crystal XRD, mass spectrometry, optical, and NMR spectroscopy shed light on the PL enhancement mechanism and the probable locations of the Au dopants within the cluster.

引用

页码：5749 / 5753

页数：5

共 39 条

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