首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >TERT-BUTYLAMMONIUM PHOSPHOMOLYBDATES - SYNTHESIS, CRYSTAL STRUCTURE, THERMAL BEHAVIOUR AND ELECTROCHEMICAL PROPERTIES
【24h】

TERT-BUTYLAMMONIUM PHOSPHOMOLYBDATES - SYNTHESIS, CRYSTAL STRUCTURE, THERMAL BEHAVIOUR AND ELECTROCHEMICAL PROPERTIES

机译:叔丁基紫铵磷酸盐-合成,晶体结构,热行为和电化学性质

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

Two tert-butylammonium phosphopolymolybdates(VI) with the formulae [(CH3)(3)CNH3](3) [PMo12O40]. 2H(2)O (1) and [(CH3)(3)CNH3](6)[P2Mo18O62]. 6H(2)O (2) have been synthesized and characterized chemically by means of FT-IR spectroscopy, microanalyses and thermal analyses. The crystal structure of compound 2 has been determined from single-crystal X-ray diffraction data. The structural analysis reveals that the asymmetric unit is composed of one heteropolyanion, [P2Mo18O62](6-), six tert-butylammonium cations and six water molecules. The heteropolyanions are disposed in rows parallel to the [1 (1) over bar 1] direction. The thermal behaviour of both compounds under an atmosphere of air and under an inert atmosphere of argon have been studied. Thermal decomposition of both compounds under oxidant atmosphere starts with the loss of the water molecules, yielding the anhydrous salt of the corresponding phosphopolymolybdate anion which is stable up to 215 degrees C. The decomposition of the anhydrous salt takes place in several exothermic steps finishing at 510 degrees C for compound 1 and at 575 degrees C for compound 2 in a residue that was identified as a mixture of MoO3 and P2O5. On the other hand, an electrochemical study for both compounds using cyclic voltammetry was carried out, showing reversible cathodic redox processes. (C) 1997 Elsevier Science Ltd. [References: 37]
机译:两种具有式[(CH3)(3)CNH3](3)[PMo12O40]的叔丁基铵磷聚钼酸盐(VI)。 2H(2)O(1)和[(CH3)(3)CNH3](6)[P2Mo18O62]。 6H(2)O(2)已合成,并通过FT-IR光谱,微观分析和热分析进行了化学表征。化合物2的晶体结构已经由单晶X射线衍射数据确定。结构分析表明,该不对称单元由一个杂多阴离子,[P2Mo18O62](6-),六个叔丁基铵阳离子和六个水分子组成。杂多阴离子以平行于[1(1)在条1上]的方向排成行。研究了两种化合物在空气气氛和氩气惰性气氛下的热行为。两种化合物在氧化剂气氛下的热分解始于水分子的损失,产生相应的磷酸多钼酸根阴离子的无水盐,该盐在高达215摄氏度的温度下稳定。无水盐的分解发生在数个放热步骤中,于510年完成残留物被鉴定为MoO3和P2O5的混合物时,化合物1的温度为70℃,化合物2的温度为575℃。另一方面,使用循环伏安法对这两种化合物进行了电化学研究,结果表明可逆的阴极氧化还原过程。 (C)1997 Elsevier Science Ltd. [参考:37]

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