Artículos de revistas
Surface Porphyrins Metalate with Zn Ions from Solution
Franke, Matthias; Marchini, Florencia; Steinrück, Hans Peter; Lytken, Ole; Williams, Federico José; Surface Porphyrins Metalate with Zn Ions from Solution; American Chemical Society; Journal of Physical Chemistry Letters; 6; 23; 12-2015; 4845-4849
Steinrück, Hans Peter
Williams, Federico José
Controlling the metalation of surface porphyrins is a critical process in porphyrin-based devices. Indeed, surface porphyrins are known to metalate in ultrahigh vacuum from codeposited metal atoms or substrate atoms; however, it is not yet known if surface porphyrins could metalate from ions in solution, that is, the most likely environment for porphyrin-based devices. Using X-ray photoelectron spectroscopy we have studied the metalation of monolayers and multilayers of a free-base tetraphenyl porphyrin adsorbed on Au(111) with ions in solution. We found that full metalation with Zn2+ can be achieved already at room temperature in contrast with the elevated temperatures required for metalation with codeposited metal atoms.