Metal-organic frameworks containing nitrogen-donor ligands for efficient catalytic organic transformations
AssigneeThe University of Chicago
InventorsWenbin Lin, Kuntal Manna, Teng Zhang
Life of this patent
Estimating the term…
Abstract
Metal-organic framework (MOFs) compositions based on nitrogen donor-based organic bridging ligands, including ligands based on 1,3-diketimine (NacNac), bipyridines and salicylaldimine, were synthesized and then post-synthetically metalated with metal precursors, such as complexes of first row transition metals. Metal complexes of the organic bridging ligands could also be directly incorporated into the MOFs. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.
Claims15
A method for preparing a crystalline and porous metal-organic framework (MOF), wherein said crystalline and porous MOF comprises periodic repeats of a metal-based secondary building unit (SBU) and a nitrogen donor-based bridging ligand, said method comprising:
- providing a nitrogen donor-based bridging ligand, wherein said nitrogen donor-based bridging ligand is a derivative of a 5,5′-bis(vinyl)-2,2′-bipyridine;
- contacting the nitrogen donor-based bridging ligand with a first metal source to obtain the crystalline and porous MOF;
- and
- contacting the crystalline and porous MOF with a second metal source to metalate the bridging ligand, wherein the second metal source comprises a metal selected from the group consisting of Fe, Co, Ni, Rh, Ru, Ir, Os, Pd, V, Cr, and Mn.
A heterogeneous catalyst comprising a crystalline and porous MOF, wherein said crystalline and porous MOF comprises periodic repeats of a metal-based secondary building unit (SBU), wherein said metal-based SBU comprises a first metal, and a nitrogen donor-based bridging ligand, wherein said nitrogen donor-based bridging ligand is a derivative of a 5,5′-bis(vinyl)-2,2′-bipyridine;
- and wherein said nitrogen donor-based bridging ligand is further complexed to a second metal, wherein the second metal is selected from the group consisting of Fe, Co, Ni, Rh, Ru, Ir, Os, Pd, V, Cr, and Mn.
Dependencies are inferred from the claim text.