Highly selective oxidation of cyclohexene to 2-cyclohexene-1-one over polyoxometalate/metal–organic framework hybrids with greatly improved performances. Issue 1 (12th December 2016)

• Record Type: Journal Article
• Authors: Tong, Jinhui; Wang, Wenhui; Su, Lingdi; Li, Qing; Liu, Fangfang; Ma, Wenmei; Lei, Ziqiang; Bo, Lili
• Is Part Of: Catalysis science & technology. Volume 7:Issue 1(2017)
• Page Start: 222
• Page End: 230
• Publication Date: 2016-12-12
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/c6cy01554a
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : H3+ x PMo12− x V x O40 @MIL-100 (Fe) ( x = 0, 1, 2) hybrids were prepared by encapsulation of polyoxometalates (POMs) within the metal–organic framework using a direct hydrothermal method. Abstract : H3+ x PMo12− x V x O40 @MIL-100 (Fe) ( x = 0, 1, 2) hybrids were prepared by encapsulation of polyoxometalates (POMs) within a metal–organic framework using a direct hydrothermal method. The as-prepared samples were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectrophotometry (FT-IR), transmission electron microscopy (TEM), N2 adsorption–desorption, UV-vis diffused reflectance spectra and inductively coupled plasma atomic emission spectrometry (ICP-AES) analysis. The catalytic performances of the samples were tested in the oxidation of cyclohexene using H2 O2 as green oxidant. The results have shown that both H4 PMo11 VO40 @MIL-100 (Fe) and H5 PMo10 V2 O40 @MIL-100 (Fe) can effectively catalyze the allylic oxidation of cyclohexene to give 2-cyclohexen-1-one as the main product. In particular, when H4 PMo11 VO40 @MIL-100 (Fe) was employed, 85% cyclohexene conversion, 91% selectivity for 2-cyclohexene-1-one and 715 h −1 of turnover frequency were obtained under optimized conditions. The catalyst can be reused at least five times without obvious loss of activity.