Birds of a feather flock together: STM and DFT studies provide the first example of spontaneous chiral resolution of a helicene on a surface. Racemic 6,13-dicyanohelicene forms fully segregated domains of pure enantiomers (2D conglomerate) on Cu(111). The propensity of the system to optimize intermolecular CN⋯HC(Ar) hydrogen bonding and CN⋯CN dipolar interactions translates into chiral recognition with preferential assembly of homochiral molecules.
- scanning probe microscopy
- spontaneous resolution
- surface-confined self-assembly
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