The titanium-based metal-organic framework MIL-125 and its amine-functionalized analog, MIL-125_NH 2 , have been synthesized and characterized by elemental analysis, XRD, SEM, TEM, N 2 adsorption measurements, and spectroscopic techniques, including FTIR, Raman, and DR UV/Vis spectroscopy. Catalytic properties of MIL-125 and MIL-125_NH 2 were evaluated in the selective oxidation of two representative alkyl-substituted phenols, 2,3,6-trimethylphenol and 2,6di-tert-butylphenol, with the clean oxidant H 2 O 2 . With both MIL-125 and MIL-125_NH 2 , the selectivity toward the corresponding p-benzoquinones was 100 %. Samples of MIL-125 with different sizes of crystallites (0.5, 1.5, and 5 μm) demon-
[a] Boreskov