Fig. 3
Size-conversion reaction induced by foreign Au(I)-SR’ complexes. Electrospray ionization mass spectra of [Au25(SR)18]− nanoclusters formed by reacting [Au23(p-MBA)16]− with varied dosage of Au(I)-(p-NTP) complexes, which are expressed by [Au(I)] = a,e,i 0 mM; b,f,j 0.1 mM; c,g,k 0.5 mM; d,h,l 1.0 mM. a–d Broad range spectra at m/z = 1000–4000; e–h zoom-in spectra of cluster peaks carrying 4- charges; and i–l experimental (black lines) and simulated (magenta lines) isotope patterns of [Au25(p-MBA)18-x(p-NTP) x – 3 H]4− with x values indicated in the corresponding panels. SR and SR’ denote different thiolate ligands, whereas p-MBA and p-NTP are para-mercaptobenzoic acid and para-nitrothiophenol, respectively
