Abstract
An oxo-diperoxo molybdenum (VI) complex was anchored on a MIL-125-NH2 Metal-Organic Framework (MOF), and its Oxygen Atom Transfer (OAT) catalytic performance in the photo-epoxidation of α-pinene was evaluated. MIL-125-NH2 was modified with salicylaldehyde and pyridine-2-aldehyde by a post-synthetic approach to produce Schiff base ligands. Then, a MoVI complex was incorporated into the resulting MOFs. Bulk and surface characterization evidenced the incorporation of the Shiff base ligands and the MoO(O2)2 complex inside the Ti-MOF by studying the effect on the properties of each post-synthetic step. The final MOFs effectively achieved the transfer of 4 oxygen atoms to 4 olefin molecules during the irradiation but without the presence of any oxidant. The complete reoxidation of the oxo-Mo-center with O2 was reached since it presented the same catalytic activity after the oxygenation cycle. Also, α-pinene oxide resulted as the main product of photoinduced OAT long-term reaction, showing high performance in the epoxidation of olefins.
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