...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Uranyl Ion Complexes with all-cis-1,3,5-Cyclohexanetricarboxylate: Unexpected Framework and Nanotubular Assemblies
【24h】

Uranyl Ion Complexes with all-cis-1,3,5-Cyclohexanetricarboxylate: Unexpected Framework and Nanotubular Assemblies

机译：具有全顺式1,3,5-环己烷三羧酸酯的铀酰离子络合物：意外的框架和纳米管组装。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

all-cis-1,3,5-Cyclohexanetricarboxylic acid (LH_3) was reacted with uranyl nitrate under solvo-hydrothermal conditions, either alone or in the presence of additional metal cations (Na~+, K~+, Ni~(2+), Cu~(2+), or Tb~(3+), resulting in the crystallization of a series of eight complexes which were characterized by their crystal structures and luminescence properties. The six complexes [UO_2(H_2O)_5][UO_2(L)]_2·2H_2O·3THF (1), [Ni(bipy)_2(H_2O)_2]- [UO_2(L)]_2·4H_2O (2), [Ni(bipy)_3][Ni(bipy)_2(H_2O)_2][UO_2(L)]_4·5H_2O (3), [Ni(H_2O)_6][UO_2(L)]_2·2H_2O (4), [Cu(H_2O)_6]- [UO_2(L)]_2·2H_2O (5), and [Tb(H_2O)_8][UO_2(L)]_3·8H_2O (6) all contain the same {UO_2(L)~?}_∞ anionic motif, in which the uranyl ion is tris-chelated by three L~(3?) anions to give a two-dimensional assembly with hexagonal {6~3} topology. The reaction of uranyl nitrate alone with LH_3 in water/N-methyl-2-pyrrolidone (NMP) yields the complex [(UO_2)_3(L)_2(NMP)_2] (7), which crystallizes as a three-dimensional framework. Finally, in the presence of Na~+, K~+, or even Kemp’s triacid (cis,cis-1,3,5- trimethylcyclohexane-1,3,5-tricarboxylic acid), the complex [UO_2(LH)] (8) is generated, the structure of which displays a wellresolved nanotubular species possibly associated with extremely disordered molecules or counterions of uncertain nature. These nanotubules have {6~3} topology and can be seen as resulting from the folding of the two-dimensional assembly present in the former complexes. Emission spectra measured in the solid state show the usual vibronic fine structure, with various degrees of resolution and quenching.
机译：在溶剂-水热条件下，使全顺式1,3,5-环己烷三甲酸（LH_3）与硝酸铀酰反应，单独或在其他金属阳离子（Na〜+，K〜+，Ni〜（2+ ），Cu〜（2+）或Tb〜（3+），导致一系列八个配合物的结晶，这些配合物的晶体结构和发光特性为其特征。六个配合物[UO_2（H_2O）_5] [UO_2 （L）] _ 2·2H_2O·3THF（1），[Ni（bipy）_2（H_2O）_2]-[UO_2（L）] _ 2·4H_2O（2），[Ni（bipy）_3] [Ni（bipy） _2（H_2O）_2] [UO_2（L）] _ 4·5H_2O（3），[Ni（H_2O）_6] [UO_2（L）] _ 2·2H_2O（4），[Cu（H_2O）_6]-[UO_2（ L）] _ 2·2H_2O（5）和[Tb（H_2O）_8] [UO_2（L）] _ 3·8H_2O（6）都包含相同的{UO_2（L）〜？} _∞阴离子基序，其中铀酰离子被三个L〜（3？）阴离子三螯合，形成具有六边形{6〜3}拓扑结构的二维组装体。硝酸铀酰与LH_3在水/ N-甲基-2-吡咯烷酮中的反应（ NMP）产生复合物[（UO_2）_3（L）_2（NMP）_2]（7），其结晶为三维框架k。最后，在Na〜+，K〜+甚至是肯普氏三酸（顺式，顺式，1,3,5-三甲基环己烷-1,3,5-三羧酸）存在下，络合物[UO_2（LH）]（ 8）产生，其结构显示出良好解析的纳米管物质，其可能与性质不确定的极端无序的分子或抗衡离子有关。这些纳米管具有{6〜3}拓扑结构，可以看作是由于先前复合物中存在的二维组装体折叠而产生的。固态测量的发射光谱显示出通常的振动细结构，具有不同程度的分辨率和猝灭。

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