Publication

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

Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield
Giada Soldan, Maha A. Aljuhani, Megalamane S. Bootharaju, Lina G. AbdulHalim, Manas R. Parida, Abdul-Hamid Emwas, Omar F. Mohammed, Osman M. Bakr
Angewandte Chemie, 128, pp 3843-3847, (2016)
Giada Soldan, Maha A. Aljuhani, Megalamane S. Bootharaju, Lina G. AbdulHalim, Manas R. Parida, Abdul-Hamid Emwas, Omar F. Mohammed, Osman M. Bakr
Koordinationschemie;Nanocluster;Nanolegierungen;Photolumineszenz;Supramolekulare Chemie
2016



 

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) suppresses 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 at 660 nm. Single-crystal XRD, mass spectrometry, optical, and NMR spectroscopy shed light onto the PL enhancement mechanism and the probable locations of the Au dopants within the cluster.

DOI: 10.1002/ange.201600267