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Ionic hydrogen bonds controlling two-dimensional supramolecular systems at a metal surface

MPS-Authors
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Payer,  D.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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

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

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Citation

Payer, D., Comisso, A., Dmitriev, A., Strunskus, T., Lin, N., Woll, C., et al. (2007). Ionic hydrogen bonds controlling two-dimensional supramolecular systems at a metal surface. Chemistry - A European Journal, 13(14), 3900-3906.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B683-0
Abstract
Hydrogen-bond formation between ionic adsorbates on an Ag(III) surface under ultrahigh vacuum was studied by scanning tunneling microscopy/spectroscopy (STM/STS), Xray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure (NEXAFS), and molecular dynamics calculations. The adsorbate, 1,3,5-benzenetricarboxylic acid (trimesic acid, TMA), self-assembles at low temperatures (250-300 K) into the known open honeycomb motif through neutral hydrogen bonds formed between carboxyl groups, whereas annealing at 420 K leads to a densely packed quartet structure consisting of flat-lying molecules with one deprotonated carboxyl group per molecule. The resulting charged carboxylate groups form intermolecular ionic hydrogen bonds with enhanced strength compared to the neutral hydrogen bonds; this represents an alternative supramolecular bonding motif in 2D supramolecular organization.