Strongly lewis acidic metal-organic frameworks for continuous flow catalysis
AssigneeThe University of Chicago
InventorsWenbin Lin, Xuanyu Feng, Pengfei Ji
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Abstract
Lewis acidic metal-organic framework (MOF) materials comprising triflate-coordinated metal nodes are described. The materials can be used as heterogenous catalysts in a wide range of organic group transformations, including Diels-Alder reactions, epoxide-ring opening reactions, Friedel-Crafts acylation reactions and alkene hydroalkoxylation reactions. The MOFs can also be prepared with metallated organic bridging ligands to provide heterogenous catalysts for tandem reactions and/or prepared as composites with support particles for use in columns of continuous flow reactor systems. Methods of preparing and using the MOF materials and their composites are also described.
Claims20
A method for preparing a catalyst, said method comprising:
- (a) providing a parent metal-organic framework (MOF), wherein the parent MOF comprises periodic repeats of a coordination complex comprising (i) an organic bridging ligand and (ii) a metal-containing secondary building unit (SBU), wherein said metal-containing SBU comprises a metal oxo cluster comprising a metal ion M and one or more terminal or bridging OH or OH2 ligands;
- and
- (b) reacting the parent MOF with a silyl triflate to replace one or more of the one or more terminal or bridging OH or OH2 ligands with a triflate ligand.
A metal-organic framework (MOF) catalyst, wherein the MOF catalyst comprises periodic repeats of a coordination complex comprising:
- (a) an organic bridging ligand;
- and
- (b) a metal-containing secondary building unit (SBU), wherein the SBU comprises a metal ion M and one or more metal ion ligands, wherein one or more of the metal ion ligands comprises a triflate ligand.
A heterogenous catalyst comprising a modified SiO2 material, wherein the modified SiO2 catalyst material comprises SiO2 particles, and wherein one or more SiO2 particles comprise a surface wherein one or more metal-organic framework (MOF) particles are attached, wherein said one or more MOF particles each comprise periodic repeats of a coordination complex comprising (i) an organic bridging ligand, and (ii) a metal-containing secondary building unit (SBU), wherein said SBU comprises a metal oxo cluster of a metal ion M and one or more triflate ligands.
Dependencies are inferred from the claim text.