In Situ Carboxylate-Functionalized {Mo₁₂O₃₈}^4--Based Three-Dimensional Supramolecular Framework as a Copper-Triggered...

Area of Science:

• Materials Chemistry
• Catalysis
• Supramolecular Chemistry

Background:

• Epoxides are valuable chemical intermediates, driving research for efficient synthesis methods.
• Developing stable and effective catalysts for alkene oxidation remains a significant challenge in chemical research.

Purpose of the Study:

• To synthesize and characterize a novel 3D supramolecular framework catalyst.
• To evaluate the catalytic efficiency and stability of the synthesized complex for alkene epoxidation.

Main Methods:

• Synthesis of a 3D supramolecular framework H[CuI(H3bdcbpy)2(Mo12O38)(H2O)] (1).
• Catalytic testing of complex 1 for alkene epoxidation using tert-butyl hydroperoxide (TBHP).
• Kinetic and mechanistic studies using free radical trapping and control experiments.

Main Results:

• Complex 1 demonstrated high efficiency in the epoxidation of cis-cyclooctene, achieving 99% conversion and 100% selectivity.
• Catalyst 1 exhibited superior activity compared to unmodified precursors and previously reported polyoxometalate-based metal-organic complexes (POMOCs).
• The stability of catalyst 1 under reaction conditions was confirmed.

Conclusions:

• The synthesized 3D supramolecular framework shows exceptional catalytic performance for alkene epoxidation.
• Complex 1 represents a promising advancement in the development of efficient and stable POMOC catalysts.
• Further investigation into the reaction mechanism and stability of complex 1 is warranted.