Controllable synthesis of polyoxovanadate-based coordination polymer nanosheets with extended exposure of catalytic sites
Controllable synthesis of polyoxovanadate-based coordination polymer nanosheets with extended exposure of catalytic sites
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延长催化位点暴露的多钒酸盐基配位聚合物纳米片的可控合成
DOI：
10.1007/s12274-016-1255-y
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发表时间：
2016-12-01
期刊：
影响因子：
9.9
通讯作者：
Wei, Yongge
中科院分区：
文献类型：
--
作者：
Bayaguud, Aruuhan;Chen, Kun;Wei, Yongge
二维纳米材料已成为一个热门的研究课题，在过去的十年中，其研究取得了长足的进展。在这里，我们展示了一种基于分子的自下而上的方法，以两种不同的方式合成独立的多金属氧酸盐纳米片。具有羧酸官能团的配体的反式取代促进了有机衍生化六氰酸酯与锌离子的优先定向配位，从而形成配位聚合物纳米片。通过透射电子显微镜、粉末x射线衍射和红外光谱的表征证实了纳米片的形貌、结构组成和优先方向。微波辅助加热法和溶剂加成法是制备聚甲醛基纳米片结构的有效方法。在温和的条件下，纳米片可以催化丙硫醇（n-PrSH）的有氧氧化生成相应的二硫化物（PrSSPr）。
Two-dimensional nanomaterials have become a hot research topic, and progress in research on them in the past decade has been substantial. Here we demonstrate a molecule-based bottom-up method to synthesize freestanding polyoxometalatebased nanosheets in two different ways. The trans substitution of ligands with carboxylate functionality promoted the coordination of organically derivatized hexavanadate with zinc ions with preferential directionality, which led to the formation of coordination polymer nanosheets. Characterization with transmission electron microscopy, powder X-ray diffraction, and infrared spectroscopy confirmed the morphology, structural composition, and preferential direction of the nanosheets. The microwave-assisted heating method and solvent addition method were proved to be effective for the preparation of POM-based nanosheet structures. The nanosheets were found to catalyze the aerobic oxidation of propanethiol (n-PrSH) to its corresponding disulfide (PrSSPr) under mild conditions.