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. 2010 Aug;1(5):1–7. doi: 10.1038/ncomms1057

Figure 5. Role of the trans effect in the observed reversibility.

Figure 5

About 1 ML of CoTPP was evaporated onto a Ni(001) surface that was previously exposed to ~6,000 L of NO to prepare a CoTPP/NO/Ni(001) system. The system was subsequently annealed at ~615 K, and Co2p XP spectra were recorded before and after annealing. Before annealing, the Co2p3/2 peak at ~780.2 eV indicates that there is no electronic interaction between CoTPP and Ni. Interestingly, even after annealing, the CoTPP remained electronically decoupled from the Ni. This control experiment shows that CoTPP on preexposed NO/Ni(001) cannot exhibit reversibility of the magnetoelectronic interaction between CoTPP and Ni (see Figs 1c and 2a). Thereby, the reversibility observed in our main experiment is attributed to gaseous NO species coordinating to the CoTPP adlayer through the trans effect6. 'a.u.' represents arbitrary units.