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Gold Doping of Silver Nanoclusters: A 26‐Fold Enhancement in the Luminescence Quantum Yield
Author(s) -
Soldan Giada,
Aljuhani Maha A.,
Bootharaju Megalamane S.,
AbdulHalim Lina G.,
Parida Manas R.,
Emwas AbdulHamid,
Mohammed Omar F.,
Bakr Osman M.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201600267
Subject(s) - nanoclusters , photoluminescence , quantum yield , nanomaterials , doping , luminescence , dopant , cluster (spacecraft) , materials science , spectroscopy , triphenylphosphine , analytical chemistry (journal) , photochemistry , chemistry , nanotechnology , crystallography , optoelectronics , physics , optics , organic chemistry , fluorescence , quantum mechanics , computer science , programming language , catalysis
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 Ag 29− x Au x (BDT) 12 (TPP) 4 , x =1–5. The Au‐doped clusters exhibit an enhanced stability and an intense red emission around 660 nm. 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.