...
首页> 外文期刊>Crystal growth & design >Uranyl Ion Complexation by Cucurbiturils in the Presence of Perrhenic, Phosphoric, or Polycarboxylic Acids. Novel Mixed-Ligand Uranyl-Organic Frameworks
【24h】

Uranyl Ion Complexation by Cucurbiturils in the Presence of Perrhenic, Phosphoric, or Polycarboxylic Acids. Novel Mixed-Ligand Uranyl-Organic Frameworks

机译:在高r酸,磷酸或多元羧酸存在下,葫芦素引起的铀酰离子络合。新型混合配体铀烷基-有机骨架

获取原文
获取原文并翻译 | 示例
           

摘要

Six novel complexes formed under hydrothermal conditions by reaction of uranium trioxide or uranyl nitrate with cucurbit[6]uril (CB6), or cucurbit[7]uril (CB7) in one case, in the presence of additional ligands, either tetrahedral oxoanions or polycarboxylic acids, have been structurally characterized. In [(UO2)(2)(CB6)(ReO4)(4)(H2O)(3)]center dot 2HReO(4)center dot 5H(2)O (1), three perrhenate ions are bound to uranyl ions and one is encapsulated in the CB6 cavity, while perrhenate acts as a counterion only in the CB7 complex [UO2(CB7)(NO3)(H2O)(2)](ReO4)center dot 5H(2)O (2). 1 is a molecular complex and 2 a one-dimensional polymer. Complex 3, [UO2(H2PO4)(2)(H2O)](2)center dot CB6 center dot H3PO4 center dot 6H(2)O, obtained in the presence of orthophosphoric acid, comprises one-dimensional uranyl dihydrogen phosphate chains, and the CB6 molecules are uncoordinated, as in [(UO2)(4)(C2O4)(3)(NO3)(2)(H2O)(6)]center dot CB6 center dot 6H(2)O (4), which displays an unprecedented tetranuclear uranyl oxalate moiety hydrogen bonded to the CB6 molecules. With pyrazinetetracarboxylic acid (H(4)PZTC), a one-dimensional polymer with alternate PZTC(4-) and CB6 ligands is formed, [(UO2)(2)(PZTC)(CB6)(H2O)(2)]center dot 12H(2)O (5). Finally, the complex [(UO2)(5)(cit)(2)(CB6)(NO3)(2)(H2O)(6)]center dot 7H(2)O (6), synthesized in the presence of citric acid (H(4)cit), is an intricate three-dimensional framework in which the uranyl citrate part builds a three-dimensional subunit defining cagelike spaces where the CB6 ligands are located. These results evidence the interest of cucurbiturils as structure-directing agents (complexes 3 and 4) and as auxiliary ligands in mixed-ligand uranyl-organic frameworks (5 and 6).
机译:在一种水热条件下,三氧化铀或硝酸铀酰与葫芦[6] uril(CB6)或葫芦[7] uril(CB7)在一种情况下,在另外的配体(四面体含氧阴离子或聚羧酸根)存在下反应生成的六种新型配合物酸在结构上已经过表征。在[(UO2)(2)(CB6)(ReO4)(4)(H2O)(3)]中心点2HReO(4)中心点5H(2)O(1)中,三个高r酸盐离子与铀酰离子结合,一个被封装在CB6腔中,而高hen酸盐仅在CB7络合物[UO2(CB7)(NO3)(H2O)(2)](ReO4)中心点5H(2)O(2)中充当抗衡离子。 1是分子络合物,2是一维聚合物。在正磷酸存在下获得的配合物3 [UO2(H2PO4)(2)(H2O)](2)中心点CB6中心点H3PO4中心点6H(2)O包含一维铀酰二氢磷酸酯链,并且CB6分子是不配位的,如[(UO2)(4)(C2O4)(3)(NO3)(2)(H2O)(6)]中心点CB6中心点6H(2)O(4)所示与CB6分子键合的前所未有的氢四氢铀酰草酸酯部分。用吡嗪四甲酸(H(4)PZTC)形成具有交替的PZTC(4-)和CB6配体的一维聚合物,[(UO2)(2)(PZTC)(CB6)(H2O)(2)]中心点12H(2)O(5)。最后,在柠檬酸存在下合成的复合物[(UO2)(5)(cit)(2)(CB6)(NO3)(2)(H2O)(6)]中心点7H(2)O(6)酸(H(4)cit)是一个复杂的三维框架,其中柠檬酸铀酰部分构建了一个三维亚基,定义了CB6配体所在的笼状空间。这些结果证明葫芦科作为结构导向剂(配合物3和4)以及作为混合配体铀酰-有机骨架(5和6)中的辅助配体的兴趣。

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