Coexistence of one- and two-dimensional supramolecular assemblies of 
terephthalic acid on Pd(111) due to self-limiting deprotonation

Cañas-Ventura, M. E.; Klappenberger, F.; Clair, S.; Pons, S.; Kern, K.; Brune, H.; Strunskus, T.; Wöll, C.; Fasel, R.; Barth, J. V.

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Coexistence of one- and two-dimensional supramolecular assemblies of terephthalic acid on Pd(111) due to self-limiting deprotonation

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Kern, K.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Barth, J. V.
Former Research Groups, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Cañas-Ventura, M. E., Klappenberger, F., Clair, S., Pons, S., Kern, K., Brune, H., et al. (2006). Coexistence of one- and two-dimensional supramolecular assemblies of terephthalic acid on Pd(111) due to self-limiting deprotonation. Journal of Chemical Physics, 125(18): 184710.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FFAD-1

Abstract

The adsorption of terephthalic acid [C6H4(COOH)(2), TPA] on a Pd(111)
surface has been investigated by means of scanning tunneling microscopy
(STM), x-ray photoelectron spectroscopy, and near-edge x-ray absorption
fine structure spectroscopy under ultrahigh vacuum conditions at room
temperature. We find the coexistence of one- (1D) and two-dimensional
(2D) molecular ordering. Our analysis indicates that the 1D phase
consists of intact TPA chains stabilized by a dimerization of the
self-complementary carboxyl groups, whereas in the 2D phase, consisting
of deprotonated entities, the molecules form lateral ionic hydrogen
bonds. The supramolecular growth dynamics and the resulting structures
are explained by a self-limiting deprotonation process mediated by the
catalytic activity of the Pd surface. Our models for the molecular
ordering are supported by molecular mechanics calculations and a
simulation of high resolution STM images.