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(A) LDI mass spectrum and (B) ESI mass spectrum of Au38(SR)24 clusters, (C) NMR of Au38(SR)24 prepared from ligand exchange (black line) and Au38(SC12)24 prepared by literature procedure (red line).13 The asterisks indicate the peaks from residual solvents. (D) TGA of Au38(SR)24 clusters.
