Direct Observation of Single-Molecule Tautomerization Using STM

Direct Observation of Single-Molecule Tautomerization Using STM [Pg.152]

STM images (top) at the bias voltage corresponding to the HOMO (left), gap (center). [Pg.152]

In addition, the tautomerization cannot be induced with bias voltages that correspond to the HOMO (-1.7 V). Since direct tunneling into or from a molecular orbital can thus be excluded as the origin, tautomerization might be induced through inelastic electron tunneling process. However, the precise mechanism has not been clarified. [Pg.153]

Another example of tautomerization is the hydrogen transfer in the cavity of a single tetraphenylporphyrin (TPP) molecule adsorbed on a Ag(lll) surface [28]. [Pg.153]

STM tip during a voltage pulse to induce the tautomerization. (b) Ball-and-stick model of the inner cavity, (c) Voltage dependence of the tautomerization rate. (Reproduced from Liljeroth et al. [27]. Copyright (2007), with permission of AAAS.) [Pg.153]

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