Catalytically active metal organic framework based on a porphyrin modified by electron-withdrawing groups

Abstract

One metal-free porphyrin, modified by electron-withdrawing groups, was synthesized by introduction of two peripheral pyridyl substituents and two metal coordination polymers, {[Zn(C₄₂H₁₆F₁₀N₆)]·2C₂H₇ N}_n (1) and {[Co(C₄₂H₁₆F₁₀N₆)]·C₂H₇ N}_n (2), were synthesized solvothermally. In 1, each porphyrin connected four other porphyrin molecules to construct a 2-D network through coordination bonds. Similarly, in 2 every Co(II) porphyrin coordinated with four adjacent molecules to form a 2-D framework. Thermogravimetric analyses indicate that both 1 and 2 show high-thermal stabilities. The fluorescence data of 1 and 2 show that 1 may be a candidate for potential inorganic–organic photoactive materials. Catalytic oxidation results show that 2 displays high activity with the only product acetophenone quantitatively in 81.4%, and after six cycles, the catalytic activity slightly decreases. These features of 2, including the exceptional stability, and high catalytic activity, make it outstanding among MOFs reported in the literature.

Keywords:

• Porphyrin
• crystal structure
• alkylbenzene oxidation
• catalytic activity

Disclosure statement

No potential conflict of interest was reported by the authors.