Dawson结构磷钨钒杂多酸有机铵盐的合成及光谱研究  

Synthesis and Spectral Study of Amine Salt of Tungstovanadophosphoric Heteropolyacid with Dawson Structure

作　　者：刘霞[1] 赵军[2] 冯长根[2] 李洪珍[3] 

机构地区：[1]中国农业大学理学院,北京100094 [2]北京理工大学新医药开发研究中心,北京100081 [3]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《光谱学与光谱分析》2007年第8期1584-1586,共3页Spectroscopy and Spectral Analysis

基　　金：中国工程物理研究院项目资助

摘　　要：以偏钒酸铵、磷酸二氢钠和钨酸钠为原料,调节溶液的pH值为4,控制反应时间为10 h,合成了三钒取代的Dawson结构磷钨钒杂多酸,然后以化学反应计量的5倍量加入抗衡离子K+,制备了母体杂多酸盐K9P2W15V3O62.41H2O。在不断的搅拌下,将母体杂多酸盐的酸性溶液缓慢滴加到十六烷基三甲基溴化铵溶液中,合成了目标化合物磷钨钒杂多酸有机铵盐(C19H42N)6H3[P2W15V3O62]。经元素分析、红外光谱、X射线粉末衍射、差热-热重等手段进行了表征,表明目标化合物仍保持Dawson结构,为未见文献报道的杂多化合物。Parent heteropoly salt was prepared by the method of stepwise addition of materials-stepwise acidification and distillation. Firstly, tungstovanadophosphoric heteropolyacid with tri-wanadium-substituted Dawson structure was synthesized with ammonium metavanadate, sodium dihydrogen phosphate and sodium tungstate as materials under the conditions of pH 4 and reaction time of 10 h. Secondly, parent heteropoly salt K9P2W15V3O62.41H2O was prepared by adding counterion K^＋ 5 times as much as determined by stoichiometric relation of reaction to the solution of tungstovanadophosphoric heteropolyacid. The acid solution of the parent heteropoly salt was slowly added to the solution of hexadecyltrimethylammonium bromide with continually stirring, then amine salt of tungstovanadophosphoric heteropolyacid, （C19H42N）6H3[P2W15V3O62] was synthesized. The target compound was characterized by elemental analysis, IR, XRD powder diffraction and TG-DTA, and the results indicated that it was a new heteropoly compound retaining Dawson structure.

关 键 词：杂多酸 铵盐 DAWSON结构 合成 

分 类 号：O611.4[理学—无机化学]