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US 11,833,495 B2Granted
Heterobimetallic catalysts and site-differentiated ligands for preparation thereof
AssigneeUniversity of Houston System
InventorsLoi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
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Abstract
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.
Claims2
A method for preparing heterobimetallic catalysts, comprising:
- reacting a compound having a structure of
- wherein A is Pd or Ni, Ph is phenyl, and B and C are independently selected from CH3, Cl, pyridine, phenyl, PPh3, wherein PPh3 is triphenylphosphine, and PMe3, wherein PMe3 is trimethylphosphine,
- with a metal salt, wherein the metal salt comprises any element of the s-block, d-block, or f-block in the periodic table to form a heterobimetallic catalyst.
Dependencies are inferred from the claim text.