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Keywords:

  • chirality;
  • enantioselectivity;
  • macrocycles;
  • self-assembly;
  • zinc
Thumbnail image of graphical abstract

Only half may enter: A homochiral porous nanoscale metallacycle has been efficiently self-assembled from semiflexible enantiopure metallosalen complexes with complementary coordination motifs. Single crystals of the macromolecule (see structure; C gray, Zn purple, O red, N blue) show a reversible and controllable dynamic behavior. Particularly, the metallacycle can be used to resolve small racemic alcohols with high enantioselectivity (over 99.0 % ee).