Keggin结构合钒混配型杂多蓝的离析和性质研究  

ISOLATION AND STUDIES ON PROPERRES OF THE HETEROPOLY BLUES CONTAINING VANADIUM WITH KEGGIN STRUCTURE

作　　者：王作屏[1] 任群翔[1] 许林[1] 沈恩洪[1] 王恩波[1] 

机构地区：[1]东北师范大学化学系

出　　处：《无机化学学报》1995年第1期63-67,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金

摘　　要：本文利用控制电位电解法首次制备出三元、四元含钒混配型—电子杂多蓝Ｋ４Ｈ２［ＳｉＶⅣＭｏ２Ｗ９Ｏ４０］·１２Ｈ２Ｏ和两电子杂多蓝通过元素分析、ＩＲ、ＵＶ—可见电子光谱、ＥＳＲ、ＸＰＳ和Ｘ射线粉末衍射对产物进行了表征和性质研究．结果表明：杂多酸盐还原为杂多蓝盾仍保持Ｋｅｇｇｉｎ结构，但结构发生畸变，畸变程度随机原子数增多而增大．还原电子具有一定的离域性，并且离域程度与中心杂原子的种类有关．The one-electron heteropoly blue K4H2[SiVⅣMo2W9O40]·12H2O and the two-electron blue 11H2O containing vanadium were prepared with the electrolytic reduction method at controlled voltage. The products were characterized and studied by elemental analyses, IR, UV-visible spectra, ESR, XPS and X-ray powder diffraction determinations. All results showed that after the heteropoly blue was formed the Keggin structure remained in heteropoly blue anion but there was slight distortion. The distortion extent increases with the number of vanadium atom. The reduction electron has slight delocalization. The extent of delocalization is related to the kind of central heteroatom.

关 键 词：杂多蓝 电子离域 畸变 钒 杂多酸 

分 类 号：O614.511[理学—无机化学] O641.4[理学—化学]