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.