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Controllable synthesis of polyoxovanadate-based coordination polymer nanosheets with extended exposure of catalytic sites

ISSN号：1000-9035
期刊名称：《分子科学学报：中英文版》
时间：0
分类：O614.121[理学—无机化学;理学—化学] TB383[一般工业技术—材料科学与工程]
作者机构：[1]Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China, [2]State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
相关基金：We are grateful to the financial support by the National Natural Science Foundation of China （Nos. 21225103, 21471087 and 21221062）, the State Key Laboratory of Natural and Biomimetic Drugs, the Specialized Research Fund for the Doctoral Program of Higher Education of China, and Tsinghua University Initiative Foundation Research Program （No. 20131089204）.

作者： Aruuhan Bayaguud[1], Kun Chen[1], Yongge Wei[1,2]

关键词：维纳米材料, 配位聚合物, 纳米催化, 多钒酸盐, 基础, 合成, 透射电子显微镜, X射线粉末衍射, polyoxometalate, nanosheet, bottom-up, catalysis

中文摘要：

二维的 nanomaterials 成为了一个热研究话题，并且在过去的十年在关于他们的研究进行是实质的。这里，我们表明一个基于分子的自底向上的方法综合以二个不同方法的独立 polyoxometalatebased nanosheets。有羧化物功能的 ligands 的 trans 替换支持了协作有机性地有有优先的 directionality 的锌离子的 derivatized hexavanadate，它导致了协作聚合物 nanosheets 的形成。有传播电子显微镜学，粉末 X 光检查衍射，和红外线的光谱学的描述证实了 nanosheets 的形态学，结构的作文，和优先的方向。帮助微波的加热方法和溶剂增加方法被证明为基于 POM 的 nanosheet 结构的准备有效。nanosheets 被发现在温和条件下面催化 propanethiol (n-PrSH ) 的氧气的氧化到它的相应二硫化物(PrSSPr ) 。

英文摘要：

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 polyoxometalate- based 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.