Abstract
We have prepared three distinct polyamino acid-based metal-organic frameworks (MOFs) with different chiralities and porosities using the same chemistry, by simply modifying the enantiomeric ratio of the chiral organic ligand used.
Highlights
We have prepared three distinct polyamino acid-based metal– organic frameworks (MOFs) with different chiralities and porosities using the same chemistry, by modifying the enantiomeric ratio of the chiral organic ligand used
We report that the enantiopurity of a chiral ligand used in MOF synthesis can be exploited to influence the structure and chirality of the resulting MOFs
Our strategy relies on the design of two enantiomorphs that act as enantiomerically pure ligands with opposite chirality, when used alone, or as a racemic mixture of ligands, when an equimolar ratio is used
Summary
We have prepared three distinct polyamino acid-based metal– organic frameworks (MOFs) with different chiralities and porosities using the same chemistry, by modifying the enantiomeric ratio of the chiral organic ligand used. Racemic mixture RS-BTAsp, under identical reaction conditions yields three 3D polyamino acid-based MOFs: two isostructural and homochiral, non-porous (but with large void volumes) MOFs with opposite optical activity (hereafter, S and R); and a third, achiral, MOF (hereafter, RS), which contains 1D pores accessible for gas uptake (Fig. 1).
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