...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A new tetra-Zr(iv)-substituted polyoxotungstate aggregate
【24h】

A new tetra-Zr(iv)-substituted polyoxotungstate aggregate

机译:一种新的Tetra-Zr(IV) - 取代的多氧钨钨酸盐聚集体

获取原文
获取原文并翻译 | 示例
           

摘要

A new tetra-Zr-substituted tungstophosphate (TP), [H2N(CH3)(2)](6)Na6H8{Zr-2[SbP2W4(OH)(2)O-21][alpha(2)-PW10O38]}(2)center dot 50H(2)O (1), has been made by the hydrothermal reaction of the [B--SbW9O33](9-) building block with Zr4+ cations and PO43- anions in the presence of dimethylamine hydrochloride and NaOAc-HOAc (pH = 4.8), and further characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD), P-31 NMR spectroscopy and single-crystal X-ray diffraction. 1 is a toroidal structure formed by two divacant [alpha(2)-PW10O38](11-) units and two [SbP2W4(OH)(2)O-21](7-) fragments linked by four Zr4+ cations. Note that the TP is reassembled with tetrahedral PO4 replacing the triangular pyramidal SbO3 in the [B-alpha-SbW9O33](9-) precursor. In addition, the pendant SbO3 derives from the dissociation of the [B-alpha-SbW9O33](9-) precursor. Furthermore, the electrochemical properties of 1 have been studied in Na2SO4 + H2SO4 supporting electrolyte (0.5 mol L-1), and indicate that 1 exhibits apparent catalytic activity toward H2O2 and BrO3- reduction. The P-31 NMR spectrum of 1 exhibits three signals with approximately proportional intensities, which is consistent with the solid-state structure.
机译:一种新的四Zr的取代的钨(TP),[H 2 N(CH 3)(2)](6)Na6H8 {Zr的2 SbP2W4(OH)(2)O-21] [α(2)-PW10O38]} (2)中心的点50H(2)O(1),已经由[B - SbW9O33]的水热反应由(9-)在二甲胺盐​​酸盐和NaOAc的存在下,用Zr 4+的阳离子和阴离子PO43-结构单元-HOAc(pH值= 4.8),并且通过IR光谱,元素分析,热重分析(TGA),粉末X射线衍射(PXRD),P-31 NMR光谱和单晶X射线衍射进一步表征。图1是由两个divacant [α(2)-PW10O38](11-)单元和两个形成的环形结构[SbP2W4(OH)(2)O-21](7-)由四个Zr 4+的阳离子连接的片段。注意,TP被重新组装以四面体PO4代替三角锥型SbO3在[B-α-SbW9O33](9-)前体。另外,从[B-α-SbW9O33](9-)前体的解离的挂件SbO3导出。此外,1的电化学特性进行了研究,硫酸钠+ H 2 SO 4的支持电解质(0.5摩尔L-1),和表示朝向H2O2和BrO3-减少一个1表现出明显的催化活性。的1个具有三个信号的P-31核磁共振光谱与大致成比例的强度,这是与固态结构一致。

著录项

  • 来源
  • 作者单位

    Beijing Inst Technol Sch Chem &

    Chem Engn MOE Key Lab Cluster Sci Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn MOE Key Lab Cluster Sci Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn MOE Key Lab Cluster Sci Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn MOE Key Lab Cluster Sci Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn MOE Key Lab Cluster Sci Beijing 100081 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;无机化学;
  • 关键词

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