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. 2019 Sep 3;20(18):2333–2339. doi: 10.1002/cphc.201900347

Figure 5.

Figure 5

Overview and detailed STM images of covalently‐linked porous mTBPB structures on Ag(111) after deposition at RT and subsequent annealing. (a–c) STM images after annealing to 525 K with self‐assembled mTBPB dimers (b) and mTBPB tetramers (c). (d) Possible structures for covalently‐linked mTBPB dimers, which feature a closed pore (Type A) and no pore (Type B). Type B dimers were only observed a handful of times. Formation of porous nanoribbons on Ag(111) upon subsequent annealing at (e) 545 K, (f) 575 K, (g) 595 K, and (h) 625 K: (e) Self‐assembled covalently‐linked short polymer chains with periodic pores. (f) Beginning of the nanoribbon formation. (g) Formation of self‐assembled nanoribbons highlighted by the blue frame. (h) Interconnected nanoribbons after desorption of Br. STM parameters: (a) 150 pA, 100 mV; (b) 300 pA, 50 mV; (c) 156 pA, 9 mV; (e) 200 pA, 100 mV; (f, g) 250 pA, 100 mV; (h) 250 pA, 50 mV.