Spontaneous Resolution of Racemic Camphorates in the Formation of Three-Dimensional Metal−Organic Frameworks

Reported here is a rare example of enantioselective processes between organic racemic ligands (dl-camphorates) with in situ formed chiral metal complexes. Such enantioselectivity leads to a double spontaneous resolution of two pairs of distinctly different racemates [the ΛΔ-Zn(Htea) units and the dl-camphorate ligands] into two chiral three-dimensional frameworks containing only one enantiommeric form from each racemate. This work demonstrates unique enantioselectivity in the self-assembly of metal−organic frameworks containing multiple chiral features, which points to a new avenue for the preparation of chiral framework materials and for the resolution of racemates.