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. 2016 Mar 11;7:11002. doi: 10.1038/ncomms11002

Figure 4. Surface-assisted formation of phthalocyanine derivatives after deposition of OETAP precursors on Au(111).

Figure 4

(a,e) Large-scale STM images showing the formation of patches of initially reacted molecules coexisting with unreacted species. (b–d) High-resolution STM images and (f–h) corresponding schematic colouring of the initial steps of reactions giving motifs 1-L, 1-V, 2-L, 2-V and L. (i,j) Zoom-in of motif 1-L and 2-L, and superimposed modelling, together with chemical drawing insets. Coloured filled dots represent ethyl moieties, bi-coloured ellipses show covalent connections between adjacent species, and mono-coloured ellipses represent full electrocyclic ring closures. Tunnelling parameters: a, Vb=−0.8 V; b, Vb=−0.7 V; c, Vb=−0.7 V; d, Vb=−0.8 V; e, Vb=−1.2 V; i, Vb=0.5 V and j, Vb=−1.5 V. Scale bars, a, 10 nm; b, 1.5 nm; c, 1.0 nm; d, 1.0 nm; e, 5 nm; f, 1.5 nm; g, 1.0 nm; h, 1.0 nm; i, 0.3 nm and j, 0.5 nm.