期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 41, 页码 15270-15273出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja407315f
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资金
- National Centre of Competence in Research Nanosciences (NCCR-Nano)
- Swiss Nanoscience Institute (SNI)
- Swiss National Science Foundation [200020-137917, 206021-113149, 206021-121461]
- Wolfermann Nageli Foundation
- Swiss National Science Foundation (SNF) [200020_137917, 206021_121461] Funding Source: Swiss National Science Foundation (SNF)
Chiral recognition as well as chirality transfer in supramolecular self-assembly and on-surface coordination is studied for the enantiopure 6,13-dicyano[7]helicene building block. It is remarkable that, with this helical molecule, both H-bonded chains and metal-coordinated chains can be formed on the same substrate, thereby allowing for a direct comparison of the chain bonding motifs and their effects on the self-assembly in experiment and theory. Conformational flexure and both adsorbate/adsorbent and intermolecular interactions can be identified as factors influencing the chiral recognition at the binding site. The observed H-bonded chains are chiral, however, the overall appearance of Cu-coordinated chains is no longer chiral. The study was performed via scanning tunneling microscopy, X-ray-photoelectron spectroscopy and density functional theory calculations. We show a significant influence of the molecular flexibility and the type of bonding motif on the chirality transfer in the ID self-assembly.
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