Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield
Aljuhani, Maha A.
Bootharaju, Megalamane Siddaramappa
AbdulHalim, Lina G.
Parida, Manas R.
Emwas, Abdul-Hamid M.
Mohammed, Omar F.
KAUST DepartmentKAUST Solar Center (KSC)
Physical Sciences and Engineering (PSE) Division
Imaging and Characterization Core Lab
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AbstractA 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 Ag29(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.
CitationSoldan G, Aljuhani MA, Bootharaju MS, AbdulHalim LG, Parida MR, et al. (2016) Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield. Angewandte Chemie International Edition 55: 5749–5753. Available: http://dx.doi.org/10.1002/anie.201600267.
SponsorsFinancial support for this work was provided by KAUST. Part of this work was by Saudi Arabia Basic Industries Corporation (SABIC) grants RGC/3/2470-01 and GIF/5/1830-01.