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US 10,442,875 B2Granted
Compositions and methods for olefin polymerization comprising metal organic frameworks
AssigneeMassachusetts Institute of Technology
InventorsMircea Dinca, Robert J. Comito
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Abstract
Compositions and methods for selective olefin (e.g., ethylene) polymerization comprising metal organic frameworks (MOFs) are generally provided. In some embodiments, a MOF comprises a plurality of metal ions, each coordinated with at least one ligand comprising at least two unsaturated N-heterocyclic aromatic groups arranged about an organic core.
Claims21
A method for forming a polyolefin from an olefin, the method comprising:
- exposing the olefin to a metal organic framework (MOF) catalyst to produce the polyolefin,
- wherein the MOF catalyst comprises a plurality of metal ions, each metal ion coordinated with at least one ligand, and
- wherein the at least one ligand comprises at least two N-heterocyclic aromatic groups arranged about an organic core.
A metal organic framework (MOF), comprising:
- a plurality of metal ions, each coordinated with at least one ligand,
- wherein the plurality of metal ions comprises at least two types of metal selected from the group consisting of Zn2+, Cr2+, and Cr3+, tetravalent metals, trivalent metals, and Zn+4, and
- wherein the at least one ligand comprises the structure:
- wherein each R1 is the same or different and is selected from the group consisting of hydrogen, -alkyl, —NO2, —R′, —F, —Cl, —Br, —I, —CN, —NC, —SO3R′, —SO3H, —OR′, —OH, —SR′, —SH, —PO3R′, —PO3H, —CF3, —NR′2, —NHR′, and —NH2, and each R′ is the same or different and is optionally substituted alkyl or optionally substituted aryl.
1 more element
Dependencies are inferred from the claim text.