Synthesis and Structure of Ti-, Zr- and Hf-Containing Polyoxotungstates and Study of their Oxidation Catalysis Properties

含Ti、Zr、Hf多钨酸盐的合成、结构及其氧化催化性能研究

• 批准号: 84600303
• 负责人: Professor Ulrich Kortz, Ph.D.
• 金额: --
• 依托单位: Boreskov Institute of Catalysis
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/84600303?language=en
• 关键词: Synthesis; Structure; Ti; Zr; Hf

We plan to synthesize novel, discrete-molecular polyoxotungstates substituted by early transition metals in high oxidation states, such as TiVI, ZrVI, HfVI. The Kortz group has documented experience in the synthesis and structural characterization of Ti containing polyoxotungstates. Very recently, we have also isolated some Zr- and Hf-substituted derivatives including peroxo-species. This synthesis know-how of the Kortz group matches perfectly with the extensive experience of the Kholdeeva group in homogeneous selective oxidation catalysis using Ti- and Zr-containing polyoxotungstates. The novel polyanions synthesized and structurally characterized in the solid state (IR, Raman, elem. analysis, TGA, single-crystal XRD) and in solution (UV-vis, electrochemistry, multinuclear NMR) by the Kortz group in Bremen will be investigated for their homogeneous catalysis potential (in particular oxidation of olefins and aromatics with environmentally benign oxidant - aqueous hydrogen peroxide) by the Kholdeeva group in Novosibirsk.

我们计划合成新的、离散分子的多氧钨酸盐，由高氧化态的早期过渡金属取代，如TiVI、ZrVI、HfVI。Kortz小组在含钛多氧化钨酸盐的合成和结构表征方面有文献记录。最近，我们还分离出了一些Zr和hf取代衍生物，包括过氧化物。Kortz集团的合成技术与Kholdeeva集团在使用含Ti和zr的多氧化钨酸盐进行均相选择性氧化催化方面的丰富经验完美匹配。合成的新型聚阴离子在固态（IR, Raman, elem）中进行了结构表征。不来梅的Kortz集团的分析，TGA，单晶XRD)和溶液（UV-vis，电化学，多核核磁共振）将由新西伯利亚的Kholdeeva集团研究其均相催化潜力（特别是烯烃和芳烃与环境友好的氧化剂-水溶液过氧化氢的氧化）。