Fig. 3: Structural anatomy of LC1 and Au23.

a The Au13 kernel. b Au13 kernel with two phosphoramidites L1. c Au13 kernel with two phosphoramidites L1 and two -S-Au-S- motifs. d The total structure of LC1. e Au13 kernel with two -S-Au-S- motifs. f Au13 kernel with four -S-Au-S- motifs. g The total structure of Au23. Color label: Au = pink, blue; S = yellow; P = green; N = orange; O = light blue; C = gray. H atoms are omitted for clarity.