Heterobimetallic catalysts and site-differentiated ligands for preparation thereof
US-11833495-B2 · Dec 5, 2023 · US
Heterobimetallic catalysts and site-differentiated ligands for preparation thereof
US11358134B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11358134-B2 |
| Application number | US-201917255846-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2019 |
| Priority date | Jul 3, 2018 |
| Publication date | Jun 14, 2022 |
| Grant date | Jun 14, 2022 |
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Abstract
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Phosphine phosphonate and phenoxyphosphine ligands bearing polyethylene glycol (PEG) chains are used as described herein to produce heterobimetallic catalysts. The ligands can be metallated selectively with palladium or nickel and secondary metal ions to provide well-defined heterobimetallic compounds. These heterobimetallic complexes exhibit accelerated reaction rates and greater thermal stability in olefin polymerization compared to other catalysts.
First claim
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What is claimed is: 1. A heterobimetallic catalyst having a structure selected from: wherein Ar is Ph, (2,6-dimethoxy)Ph or (2-MeO)Ph, Ph is a phenyl group, PPh 3 is triphenylphosphine, PMe 3 is trimethylphosphine, M is Li, Na, or K, R is an alkyl or aryl group, and X is an electron donating or withdrawing group. 2. A method for catalyzing homopolymerization of ethylene, comprising: combining ethylene with the heterobimetallic catalyst of claim 1 , whereby the ethylene undergoes homopolymerization. 3. A method for catalyzing copolymerization of ethylene and polar olefins, comprising: combining ethylene and polar olefins with the heterobimetallic catalyst of claim 1 , whereby the ethylene and polar olefins undergo copolymerization. 4. A heterobimetallic catalyst having a structure of: wherein Ph is a phenyl group and PMe 3 is trimethylphosphine. 5. A method for catalyzing homopolymerization of ethylene, comprising: combining ethylene with the heterobimetallic catalyst of claim 4 , whereby the ethylene undergoes homopolymerization. 6. A method for catalyzing copolymerization of ethylene and polar olefins, comprising: combining ethylene and polar olefins with the heterobimetallic catalyst of claim 4 , whereby the ethylene and polar olefins undergo copolymerization. 7. A heterobimetallic catalyst having a structure selected from: wherein Ar is an aromatic group, Ph is a phenyl group, PPh 3 is triphenylphosphine, PMe 3 is trimethylphosphine, M is Li, Na, or K, R is an alkyl or aryl group, and X is an electron donating or withdrawing group. 8. A method for catalyzing homopolymerization of ethylene, comprising: combining ethylene with the heterobimetallic catalyst of claim 7 , whereby the ethylene undergoes homopolymerization. 9. A method for catalyzing copolymerization of ethylene and polar olefins, comprising: combining ethylene and polar olefins with the heterobimetallic catalyst of claim 7 , whereby the ethylene and polar olefins undergo copolymerization.
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Classifications
Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands · CPC title
- B01J31/2247Primary
At least one oxygen and one phosphorous atom present as complexing atoms in an at least bidentate or bridging ligand · CPC title
Ethene · CPC title
- B01J31/2243Primary
At least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand · CPC title
At least one oxygen and one phosphorous atom present as complexing atoms in an at least bidentate or bridging ligand · CPC title
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- What does patent US11358134B2 cover?
- Phosphine phosphonate and phenoxyphosphine ligands bearing polyethylene glycol (PEG) chains are used as described herein to produce heterobimetallic catalysts. The ligands can be metallated selectively with palladium or nickel and secondary metal ions to provide well-defined heterobimetallic compounds. These heterobimetallic complexes exhibit accelerated reaction rates and greater thermal stabi…
- Who is the assignee on this patent?
- Univ Houston System
- What technology area does this patent fall under?
- Primary CPC classification B01J31/2247. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 14 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).