化学学报 ›› 1988, Vol. 46 ›› Issue (8): 757-762. 上一篇    下一篇

研究论文

具有Dawson结构的钼钒磷杂多酸的制备和性质研究

王恩波;高丽华;刘景福;刘宗绪;阎德环   

  1. 东北师范大学化学系
  • 发布日期:1988-08-15

Preparation and properties of the molybdovanadophosphoric acids with Dawson structure

WANG ENBO;GAO LIHUA;LIU JINGFU;LIU ZONGXU;YAN DEHUAN   

  • Published:1988-08-15

本文报道用改良的分步处理合成方法, 直接制备了五种未见报道的2:18系列钼钒磷杂多酸, 详细考察了它们的生成条件. 经元素分析、电位滴定和差热热重分析确定阴离子的组成分别为[P2Mo17VO62]^7^-,[P2Mo16V2O62]^8^-,[P2Mo15V3O62]^9^-, [P2Mo14V4O62H2]^8^-, [P2Mo13V5O62H2]^9^-. 对五种杂多酸的热化学性质和碱度进行了讨论. 根据紫外、红外及X射线衍射结果讨论了它们的结构, 表明都属于具有Dawson结构的杂多化合物.

关键词: 红外分光光度法, 杂多酸, 催化剂, X射线衍射分析, 电位滴定, 热稳定性, 结构分析, 磷酸盐 P, 热重量分析, 差热分析

Five free molybdovanadophosphoric acids having Dawson structure were prepared by the use of an improved procedure. The effect of reaction conditions on the formation of the 5 heteropolyacids was studied. The constitutions of these heteropolyanions are [P2Mo17VO62]7-, [P2Mo16V2O62]8-, [P2Mo15V3O62]9-, [P2Mo14V4O62H2]8-, [P2Mo13V5O62H2]9-. TGA and DTA were performed on these heteropolyacids. Potentiometric titration, IR and UV spectra and x-ray power diffraction were studied.

Key words: INFRARED SPECTROPHOTOMETRY, HETEROPOLYACID, CATALYST, X-RAY DIFFRACTION ANALYSIS, POTENTIOMETRIC TITRATION, THERMAL STABILITY, STRUCTURAL ANALYSIS, PHOSPHATE P, THERMOGRAVIMETRY, DIFFERENTIAL THERMAL ANALYSIS

中图分类号: