Triphenylphosphine-Based Covalent Organic Frameworks and Heterogeneous Rh-P-COFs Catalysts

Area of Science:

• Materials Science
• Catalysis
• Organic Chemistry

Background:

• Covalent organic frameworks (COFs) are crystalline porous polymers with tunable properties.
• Phosphine-based functional materials are of interest for catalysis.
• Immobilizing homogeneous catalysts in heterogeneous supports can improve efficiency and recyclability.

Purpose of the Study:

• To synthesize and characterize novel triphenylphosphine-based COFs (P-COFs).
• To evaluate the performance of rhodium catalysts supported on P-COFs for olefin hydroformylation.
• To demonstrate the application of P-COFs in heterogeneous catalysis.

Main Methods:

• Synthesis of triphenylphosphine-based COFs.
• Characterization of COF structures, surface areas, and thermal stability.
• Immobilization of rhodium catalysts onto P-COFs.
• Testing catalytic activity and recyclability in olefin hydroformylation.

Main Results:

• Two P-COFs with well-defined crystalline structures, high surface areas, and good thermal stability were successfully synthesized.
• Rhodium catalysts supported on P-COFs exhibited high turnover frequency in olefin hydroformylation.
• Excellent recycling performance of the supported rhodium catalysts was observed.

Conclusions:

• The study expands the family of phosphine-based COFs.
• P-COFs serve as effective supports for immobilizing homogeneous rhodium catalysts.
• This approach facilitates the application of metal-based catalysts in heterogeneous systems, enhancing efficiency and recyclability.