Adsorption, Assembly, and Oligomerization of Aspartic Acid on Pd(111)Click to copy article linkArticle link copied!
Abstract
The surface chemistry of l-aspartic acid is studied on Pd(111) in ultrahigh vacuum using reflection absorption infrared spectroscopy (RAIRS) and scanning tunneling microscopy (STM) as a function of sample temperature and coverage. Density functional theory (DFT) calculations are carried out to supplement the experimental results. At low temperatures, the dominant surface species was found to be monoaspartate species at all the experimental coverages. The monoaspartate species undergo extensive intermolecular hydrogen-bonding interactions and form extended two-dimensional ordered structures, forming either a honeycomb pattern or linear-row structures. At room temperature, aspartic acid undergoes a self-polymerization reaction to form oligosuccinimide networks, although some individual monoaspartate species are also observed.
Cited By
This article is cited by 3 publications.
- Riho T. Seljamäe-Green, Thomas A. Robinson, Herbert A. Früchtl, Christopher J. Baddeley. Oligomerization of Proline Catalyzed by Nickel on a Au(111) Surface. The Journal of Physical Chemistry C 2019, 123
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, 9935-9943. https://doi.org/10.1021/acs.jpcc.9b01004
- Michael Radetic, Andrew J. Gellman. Dual decomposition pathways for L-aspartic acid on Ni(100). Surface Science 2022, 717 , 121980. https://doi.org/10.1016/j.susc.2021.121980
- Denis Music, Damian M. Holzapfel, Felix Kaiser, Erik Wehr. Aspartic acid adsorption on thermoelectric surfaces. Applied Surface Science 2019, 496 , 143716. https://doi.org/10.1016/j.apsusc.2019.143716
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