Immobilization of catalytically active polyoxotungstate into ionic liquid-modified MIL-100(Fe): A recyclable catalyst for selective oxidation of benzyl alcohol

A new polyoxometalate-based catalyst, PW4/DAIL/MIL-100(Fe), was prepared by the immobilization of peroxopolyoxotungstate (PW4O243-, PW4) into the nanocages of dual amino-functionalized ionic liquid (DAIL)-modified MIL-100(Fe) framework. The catalytic behavior of the resulting material was evaluated in the oxidation of benzyl alcohol using TBHP as the oxidant. Moreover, the catalytic performance of PW4/DAIL/MIL-100(Fe) was compared with that of the DAIL free catalyst (HPW4/MIL-100(Fe)). In comparison with the HPW4/MIL-100(Fe) material, the PW4/DAIL/MIL-100(Fe) showed an enhanced catalytic performance in the selective oxidation of benzyl alcohol due to the ability of DAIL groups to form hydrogen bonds and enhancing the accessibility of TBHP. (C) 2017 Elsevier B.V. All rights reserved.