Journal
NANO LETTERS
Volume 15, Issue 8, Pages 5388-5392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01762
Keywords
Single molecule manipulation; STM; chirality; intermolecular recognition
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Funding
- Swiss National Science Foundation (Supramolecular Chiral Films)
- University of Zurich Research Priority Program LightChEC
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Understanding the principles of molecular recognition is a difficult task and calls for investigation of appropriate model systems. Using the manipulation capabilities of scanning tunneling microscopy (STM) we analyzed the chiral recognition in self-assembled dimers of helical hydrocarbons at the single molecule level. After manual separation of the two molecules of a dimer with a molecule-terminated STM tip on a Cu(111) surface, their handedness was subsequently determined with a metal atomterminated tip. We find that these molecules strongly prefer to form heterochiral pairs. Our study shows that single molecule manipulation is a valuable tool to understand intermolecular recognition at surfaces.
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