Self-Assembly of Two Chiral Supramolecules with Three-Dimensional Porous Host Frameworks:  (Δ){[Fe^II(phen)₃][Fe^IIINa(C₂O₄)₃]}_n and Its Enantiomer

Two chiral supramolecules with enantiomeric three-dimensional porous host frameworks, (Δ){[Fe^II(phen)₃][Fe^IIINa(C₂O₄)₃]}_n (1) and (Λ){[Fe^II(phen)₃][Fe^IIINa(C₂O₄)₃]}_n (2) (phen = 1,10-phenanthroline), have been synthesized, and their crystal structures have been determined. The structural analysis shows that compounds 1 and 2 are a pair of enantiomers, both consisting of a three-dimensional porous skeleton formed by (Δ)/(Λ){[Fe^IIINa(C₂O₄)₃]^2-}_n and guest (Δ)/(Λ)[Fe(phen)₃]²⁺ units. The circular dichroism spectrum measurements confirmed the optical activity and the enantiomeric nature of complexes 1 and 2.