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

被引：315
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
收藏
页码：5749 / 5753
页数：5
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