Robust Bifunctional Lanthanide Cluster Based Metal-Organic Frameworks (MOFs) for Tandem Deacetalization-Knoevenagel Reaction.

A series of 12-connected lanthanide cluster based metal-organic frameworks (MOFs) have been constructed by [Ln ₆ (μ ₃ -OH) ₈ (COO-) ₁₂ ] secondary building units (SBUs) and 2-aminobenzenedicarboxylate (BDC-NH ₂ ) ligands. These obtained materials exhibit high chemical stability and generic thermal stability, especially in acidic and basic conditions. They also present commendable CO ₂ adsorption capacity, and Yb-BDC-NH ₂ was further confirmed by a breakthrough experiment under both dry and wet conditions. Moreover, these materials possess both Lewis acid and Brønsted base sites that can catalyze one-pot tandem deacetalization-Knoevenagel condensation reactions.