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. 2023 Feb 6;123(4):1552–1634. doi: 10.1021/acs.chemrev.2c00316

Figure 36.

Figure 36

Monitoring the bond breaking and making processes at the single-chemical-bond level. (a) STM topograph of three types of “pentacene” molecules (α, β, γ) and the simultaneously acquired SRP image for the C–H stretching vibration and theoretically simulated Raman maps. (b) Optimized geometries of α-, β-, and γ-pentacene and the corresponding Q-plus AFM images. Adapted with permission from ref (262). Copyright 2021 American Association for the Advancement of Science. (c) Line-trace TERS measurements over a single melamine molecule on Cu(100) for the symmetric and antisymmetric N–H stretching vibration modes and corresponding TERS mapping images. (d) Schematic showing the vertical resolving ability of TERS for the N–H stretching vibrations at the bottom. (e) Sketch for the dehydrogenation and hydrogen tautomerization processes. Adapted with permission from ref (261). Copyright 2021 Oxford University Press on behalf of China Science Publishing & Media Ltd.