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

Giada Soldan, Maha A. Aljuhani, Megalamane Siddaramappa Bootharaju, Lina G. AbdulHalim, Manas R. Parida, Abdul-Hamid M. Emwas, Omar F. Mohammed, Osman Bakr

Research output: Contribution to journalArticlepeer-review

160 Scopus citations

Abstract

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 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.
Original languageEnglish (US)
Pages (from-to)5749-5753
Number of pages5
JournalAngewandte Chemie International Edition
Volume55
Issue number19
DOIs
StatePublished - Apr 6 2016

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