Imidazole-Functionalized Polyoxometalate Catalysts for the Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran Using Atmospheric O2
| العنوان: | Imidazole-Functionalized Polyoxometalate Catalysts for the Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran Using Atmospheric O2 |
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| المؤلفون: | Jie Li, Zhengguo Lin, Changwen Hu, Baokuan Chen, Dan Liu, Peihe Li, Yingnan Chi, Ni Zhen |
| المصدر: | Inorganic Chemistry. 60:3909-3916 |
| بيانات النشر: | American Chemical Society (ACS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 010405 organic chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, Inorganic Chemistry, chemistry.chemical_compound, chemistry, 5-hydroxymethylfurfural, Polyoxometalate, Carbon source, Imidazole, Molecule, Organic chemistry, Physical and Theoretical Chemistry, Selectivity |
| الوصف: | Biomass as a sustainable and abundant carbon source has attracted considerable attention as a potential alternative to petroleum resources. The selective oxidation of 5-hydroxymethylfurfural (HMF), a versatile platform molecule, to value-added 2,5-diformylfuran (DFF) provides an efficient pathway for biomass valorization. Herein, three discrete imidazole-functionalized polyoxometalates (POMs), HPMo8VVI4O40(VVO)2[(VIVO)(IM)4]2·nH2O·(IM)m (IM = 1-methylimidazole, n = 4, m = 8 for 1; IM = 1-ethylimidazole, n = 4, m = 9 for 2; IM = 1-propylimidazole, n = 0, m = 4 for 3), have been successfully synthesized by a facile solvothermal method and thoroughly characterized by routine techniques. Compounds 1-3 contain a bi-capped pseudo-Keggin {HPMo8V4O40(VO)2} and two imidazole-functionalized {(VO)(IM)4} groups, which, to our knowledge, represent the first examples of organic-functionalized Mo-V clusters. Compounds 1-3 as heterogeneous catalysts can effectively promote the transformation of HMF to DFF using atmospheric O2 as oxidant. Under minimally optimized conditions, 95% of HMF was converted by 1 with 95% selectivity for DFF and its catalytic activity was basically maintained after five cycles. Moreover, the important roles of the bi-capped pseudo-Keggin cluster and the functionalized V groups in the selective oxidation of HMF have been explored. According to experimental and spectroscopic results, a three-step oxidation mechanism of HMF to DFF has been proposed. |
| تدمد: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.0c03698 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9d501eeeb3ecbc06d0006d900ee5ceeb https://doi.org/10.1021/acs.inorgchem.0c03698 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........9d501eeeb3ecbc06d0006d900ee5ceeb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1520510X 00201669 |
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| DOI: | 10.1021/acs.inorgchem.0c03698 |