...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Trinuclear ruthenium core-containing polyoxometalate-based hybrids: preparation, characterization and catalytic behavior
【24h】

Trinuclear ruthenium core-containing polyoxometalate-based hybrids: preparation, characterization and catalytic behavior

机译:含干核钌的含有多氧乙酸酯的杂种:制备,表征和催化行为

获取原文
获取原文并翻译 | 示例
           

摘要

Two ruthenium-containing polyoxometalate-based hybrids (Ru-POMs), KH8[Ru3O(Trz)(6)Cl-3](2)[(NaO6)W-6(H2O)(6)(AsW9O33)(4)]center dot 28H(2)O (1) and H-3[Ru3O(Trz)(6)Cl-3](2)[(WO)(2)W(OH)(AsW9O33)(2)]center dot 6H(2)O (2), (Trz = 1,2,4-triazole), were successfully isolated by a one-step hydrothermal method under different acidic conditions and further characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), IR spectroscopy, electrospray ionization and mass spectrometry (ESI-MS), thermogravimetric (TG) analyses and elemental analyses. Single-crystal X-ray diffraction analyses reveal two polyanions comprised of four/two identical trivacant Keggin-type polyanion building blocks, leading to the formation of tetrameric/dimeric assembly stabilized by additional metal-oxo cores, respectively. ESI-MS shows that the polyanion units [(NaO6)W-6(H2O)(6)(AsW9O33)(4)](11-) and [(WO)(2)W(OH)(AsW9O33)(2)](5-) are intact in mixed solvent. Moreover, the two heterogeneous catalysts with trinuclear ruthenium cations were further investigated, and 1 was found to exhibit much higher yield (94.1%)/conversion (95.1%) and better selectivity (>99%) towards the oxidation of thioanisole to sulfoxide than 2.
机译:两个含钌的多氧乙酸酯基杂交物(Ru-POMS),KH8 [Ru3O(Trz)(6)Cl-3](2)[(NaO 6)W-6(H 2 O)(6)(AsW9O33)(4)]]中心点28H(2)O(1)和H-3 [Ru3O(Trz)(6)Cl-3](2)[(WO)(2)W(OH)(ASW9O33)(2)]中心点6小时(2)O(2),(TRZ = 1,2,4-三唑)在不同的酸性条件下通过一步水热法成功分离,并进一步表征单晶X射线衍射,粉末X射线衍射(PXRD),IR光谱,电喷雾电离和质谱(ESI-MS),热重分析(TG)分析和元素分析。单晶X射线衍射分析显示由四个/两个相同的微曲线Keggin型聚阴离子构建块组成的两个聚膜,导致分别由另外的金属 - 氧代芯稳定的四聚体/二聚体组件形成。 ESI-MS表明聚阴离子单元[(NaO6)W-6(H 2 O)(6)(ASW9O33)(4)](11-)和[(WO)(2)W(OH)(ASW9O33)(2) ](5-)在混合溶剂中完整。此外,进一步研究了具有三核钌阳离子的两个非均相催化剂,并发现1个具有更高的产率(94.1%)/转化率(95.1%)和更好的选择性(> 99%),朝向硫氧化硫醚氧化而不是2 。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号