Patents by Inventor Zhongzheng CAI

Zhongzheng CAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11833495
    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.
    Type: Grant
    Filed: March 22, 2023
    Date of Patent: December 5, 2023
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Publication number: 20230249169
    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.
    Type: Application
    Filed: March 22, 2023
    Publication date: August 10, 2023
    Applicant: University of Houston System
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Patent number: 11712686
    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.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: August 1, 2023
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Publication number: 20220274097
    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.
    Type: Application
    Filed: February 25, 2022
    Publication date: September 1, 2022
    Applicant: University of Houston System
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Patent number: 11413565
    Abstract: Disclosed are MOFs containing nucleophilic transition metal hydroxide (M-OH) groups. In certain embodiments, these MOFs can include a plurality of metal ions, each coordinated with one or more hydroxide ligands and one or more backbone ligands. In certain embodiments, the MOFs can comprise Kuratowski cluster-based secondary building units (SBUs). These MOFs can exhibit excellent performance for low pressure CO2 capture via a CO2/HCO3? fixation mechanism in which cooperative inter-cluster hydrogen bonding interactions enhance CO2 capture performance. Also provided are methods of making MOFs including one or more metal hydroxide moieties, as well as methods of using these MOFs to capture an acidic gas (e.g., CO2, SO2, NO2, or acetylene).
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: August 16, 2022
    Assignee: Ohio State Innovation Foundation
    Inventors: Casey Wade, Caitlin Bien, Zhongzheng Cai
  • Patent number: 11358134
    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.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: June 14, 2022
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Publication number: 20210260567
    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.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 26, 2021
    Applicant: University of Houston System
    Inventors: Loi Hung Do, Zhongzheng Cai, Thi Tran, Dawei Xiao
  • Publication number: 20210138385
    Abstract: Disclosed are MOFs containing nucleophilic transition metal hydroxide (M-OH) groups. In certain embodiments, these MOFs can include a plurality of metal ions, each coordinated with one or more hydroxide ligands and one or more backbone ligands. In certain embodiments, the MOFs can comprise Kuratowski cluster-based secondary building units (SBUs). These MOFs can exhibit excellent performance for low pressure CO2 capture via a CO2/HCO3? fixation mechanism in which cooperative inter-cluster hydrogen bonding interactions enhance CO2 capture performance. Also provided are methods of making MOFs including one or more metal hydroxide moieties, as well as methods of using these MOFs to capture an acidic gas (e.g., CO2, SO2, NO2, or acetylene).
    Type: Application
    Filed: June 11, 2019
    Publication date: May 13, 2021
    Inventors: Casey WADE, Caitlin BIEN, Zhongzheng CAI