Publication date: Oct 11, 2021
The production of enantiopure materials and molecules is of uttermost relevance in research and industry in numerous contexts, ranging from non-linear optics to asymmetric synthesis. In the context of the latter, we have investigated dehalogenation, which is an essential reaction step for a broad class of chemical reactions. Specifically, dehalogenation of prochiral 5-bromo-7-methylbenz(a)anthracene (BMA) on prototypical, chiral, intermetallic PdGa{111} surfaces under ultrahigh vacuum conditions. Enantioselective halogen elimination is demonstrated by combining temperature-programmed x-ray photoelectron spectroscopy, scanning probe microscopy, and density functional theory. On the PdGa{111} surfaces, the difference in debromination temperatures for the two BMA surface enantiomers amounts up to unprecedented 46 K. The significant dependence of the dehalogenation temperature of the BMA surface enantiomers on the atomic termination of the PdGa{111} surfaces, implies that the ensemble effect is pronounced in this reaction step. These findings evidence enantiospecific control and hence promote intrinsically chiral crystals for asymmetric on-surface synthesis. The record contains input files to reproduce the calculations discussed in the manuscript and the raw data of the experimental images discussed.
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File name | Size | Description |
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ReadMe.yaml
MD5md5:6cd9b757abb091bd98537880750b222a
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27.3 KiB | README file in yaml format detailing the content of the record |
data.tgz
MD5md5:375dae1b977df5f7b3a34ee46015fa1a
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256.6 MiB | tar file containing all data |
debromination.aiida
MD5md5:a6252cd0acc0dad155c6df8face98a82
Open this AiiDA archive on renkulab.io (https://renkulab.io/)
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662.6 MiB | Archive of AiiDA nodes for the calculations of geometry optimization (brominated molecules) desribed in the manuscript and SI. |
2021.162 (version v1) [This version] | Oct 11, 2021 | DOI10.24435/materialscloud:pm-8p |