期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 656, 期 1-3, 页码 101-106出版社
ELSEVIER
DOI: 10.1016/S0022-2860(03)00272-2
关键词
polyoxometalates; polyoxocations; tungstophosphates; uranyl; zirconium
Two new composite polyoxotungstate anions with unprecedented structural features, [(UO2)(12)(mu(3)-O)(4)(mu(2)H(2)O)(12)(P2W15O56)(4)](32-) (1) and [Zr-4(mu(3)-O)(2)(mu(2)-OH)(2)(H2O)(4) (P2W16O59)(2)](14-) (2) contain polyoxo-uranium and -zirconium clusters as bridging units. The anions are synthesized by reaction of Na-12[P2W15O56] with solutions of UO2(NO3)(2) and ZrCl4. The structure of 1 in the sodium salt contains four [P2W15O56](12-) anions assembled into an overall tetrahedral cluster by means of trigonal bridging groups formed by three equatorial-edge-shared UO7 pentagonal bipyramids. The structure of anion 2 consists of a centrosymmetric assembly of two [P2W16O59](12-) anions linked by a {Zr4O2(OH)(2)(H2O)(4)}(10+) cluster. Both complexes in solution yield the expected two-line P-31-NMR spectra with chemical shifts of -2.95, -13.58 and -6.45, -13.69 ppm, respectively. (C) 2003 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据