Efficient Mechanochemical Synthesis of Polyoxometalate⊂ZIF Complexes as Reusable Catalysts for Highly Selective Oxidation.
Efficient Mechanochemical Synthesis of Polyoxometalate⊂ZIF Complexes as Reusable Catalysts for Highly Selective Oxidation.
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DOI：
10.1021/acs.inorgchem.7b02163
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发表时间：
2017-11
影响因子：
4.6
通讯作者：
Xiaoxiao Zhao;Y. Duan;Fei Yang;Wei Wei-Wei;Yanqing Xu;Changwen Hu
中科院分区：
文献类型：
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作者：
Xiaoxiao Zhao;Y. Duan;Fei Yang;Wei Wei-Wei;Yanqing Xu;Changwen Hu
一锅机械化学合成被证明是一种有效的策略，可以合成具有高结晶度的主客体POM布满rho- zif复合物（POM =多金属氧酸盐；rho- zif =具有rho拓扑结构的沸石咪唑盐框架）。在这项工作中，亚稳的rho-ZIF具有较大的内腔和窗口作为宿主基质，用于封装和固定体积较大的客体分子，具有较高的负载效率和化学稳定性。作为新型催化剂，POM∧rho-ZIF配合物被发现能有效地将一系列硫化物选择性氧化为亚砜。此外，通过浸出试验证实了这些复合催化剂的非均质性，并且它们可以循环使用至少四次而不会显著降低活性。
One-pot mechanochemical synthesis was demonstrated to be an efficient strategy to synthesize host-guest POM⊂rho-ZIF complexes (POM = polyoxometalate; rho-ZIF = zeolitic imidazolate framework with rho topology) with high crystallinity. In this work, the metastable rho-ZIF with large interior cavities and windows was used as host matrix for encapsulating and immobilizing bulky guest molecules with high loading efficiency and chemical stability. As novel catalysts, POM⊂rho-ZIF complexes were found effective for the selective oxidation of a series of sulfides to sulfoxides. Moreover, the heterogeneity of these composite catalysts was confirmed by leaching tests, and they can be recycled at least four times without significant loss of activity.