Fig. 7
From: Selective on-surface covalent coupling based on metal-organic coordination template
Fe-tpy templated debrominated C–C coupling of m-DBTB. a An STM overview with the sample annealed at 457 K. b High-resolution STM of the organometallic chains with structural models overlaid. The Fe-coordination is represented by purple spheres, while the central sphere is bold to highlight the specific state of the central Fe atom. c High-resolution image of SPy units (III-mode). d STM overview of the SPy-m-Ph ribbons after annealing at 547 K. e, f Segments of the ribbon and the structural model. g–j The C-Au-C organometallic and C-C coupled hyper-ring units with their corresponding structural models. Scale bars: (a, d) 10 nm; (b, c, e, g and i) 2 nm. Data acquisition conditions (T = 293 K): (a) −1.0 V, 0.5 nA; (b) −0.5 V, 2.0 nA; (c) −1.2 V, 0.5 nA; (d) −1.0 V, 0.2 nA. (e) −1.0 V, 1.2 nA; (g) −1.0 V, 1.0 nA; (i) −1.0 V, 0.2 nA
