Robust, Highly Luminescent Au₁₃ Superatoms Protected by N-Heterocyclic Carbenes

Abstract

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Surface chemistry of gold nanoparticles for health-related applications

“…99 The Nheterocyclic carbene-modied AuNPs/AuNCs show high uorescence quantum yield and high stability against thermal damage. [100][101][102] Based on the same principle, the more stable carbene-Au bond should be able to overcome thiol interference as well as the Au-Se bond. Overall, the surface chemistry of gold endows AuNPs with good antibacterial properties.…”

Ligand-protected gold/silver superatoms: current status and emerging trends

“…65,85 Following the above report, Au superatoms protected only by other NHCs and halogens have been reported. [86][87][88] For example, [Au 13 (NHC Bn ) 9 Cl 3 ] 2+ (NHC Bn = C 7 H 4 N 2 (CH 2 Ph) 2 ) ( Fig. 6b) 86 and [Au 13 (di-NHC) 5 Br 2 ] 3+ (di-NHC = PhCH 2 -C 7 H 4 N 2 -(CH 2 ) 3 -C 7 H 4 N 2 -CH 2 Ph) ( Fig.…”

“…[86][87][88] For example, [Au 13 (NHC Bn ) 9 Cl 3 ] 2+ (NHC Bn = C 7 H 4 N 2 (CH 2 Ph) 2 ) ( Fig. 6b) 86 and [Au 13 (di-NHC) 5 Br 2 ] 3+ (di-NHC = PhCH 2 -C 7 H 4 N 2 -(CH 2 ) 3 -C 7 H 4 N 2 -CH 2 Ph) ( Fig. 6c) 88 with an icosahedral Au 13 (8e) core were synthesized.…”

“…As a result, [Au 13 (NHC Np ) 9 Cl 3 ] 2+ (NHC Np = C 7 H 4 N 2 (CH 2 (2-C 10 H 7 )) 2 ) and [Au 13 (di-NHC) 5 Br 2 ] 3+ exhibit visible photoluminescence with quantum yields as high as 16 and 15 %, respectively. 86,88…”

Polymorphism of Au11(PR3)7Cl3 clusters: understanding C–H⋯π interaction and C–H⋯Cl–C van der Waals interaction on cluster assembly by surface modification

“…16 Crudden et al showed that multiple C-H/p and p/p interactions rigidify the ligands and contribute to the high photoluminescent quantum yields in the Au 13 nanocluster. 31 Zheng et al reported that p/p interactions play a crucial role in stabilizing silver nanoclusters. 32 Xie et al found that the assembly behaviour of clusters can be regulated by metal ions (i.e., Ag + /Cs + ).…”