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. 2019 Apr 16;141(18):7399–7406. doi: 10.1021/jacs.9b01267

Figure 4.

Figure 4

Cyclodehydrogenation reactions of 2,2″,6,6″-tetra(2-naphthyl)-p-terphenyl (TNTP, 1b) on Au(111). (a) STM overview of the self-assembly of TNTP 1b molecules on Au(111); (b) STM overview of the TNTP/Au(111) sample after annealing at 720 K for 30 min. (c,d) Chemical structures of TNTP 1b and dibenzoperihexacene 3b. (e) STM image of a single planarized product molecule marked with a red box in (b); (f) corresponding frequency shift AFM image. Imaging parameters: (a, b) −1.0 V, 10 pA; (e) 1.0 V, 100 pA; and (d) tip height Z = −50 pm, where the – sign means a decrease of the tip–sample distance relative to the STM set point (0.1 V, 10 pA) on the adjacent Au(111) surfaces.