...
首页> 外文期刊>Crystal growth & design >A Family of UO_2~(2+)?5-Nitro-1,3-dicarboxylate Hybrid Materials: Structural Variation As a Function of pH and Structure Directing Species
【24h】

A Family of UO_2~(2+)?5-Nitro-1,3-dicarboxylate Hybrid Materials: Structural Variation As a Function of pH and Structure Directing Species

机译:UO_2〜(2 +)?5-硝基-1,3-二羧酸酯杂化材料家族:结构变化与pH和结构导向物种的关系

获取原文
获取原文并翻译 | 示例
           

摘要

Four new UO_2~(2+) compounds were hydrothermally synthesized and incorporate 5-nitro-1,3-benzenedicarboxylic acid (n-bzdc): [(UO_2)(C_8N_1O_6H_3)(H_2O)]·H_2O (1),[(UO_2)2(C_8N_1O_6H_3)2H_2O]·TEA (2); [(UO_2)2(OH)-(C_8N_1O_6H_3)2]·(TEAH)(H_2O) (3); [(UO_2)(C_8N_1O_6H_3)-(C_8N_1O_6H_4)]·TMAH (4). Compound 1 consists of pentagonal bipyramidal uranyl monomers bridged via n-bzdc linkers to form a double-stranded chain, a structural motif that also serves as the foundation for the 2-D sheet of 2 and the 3-D framework of 3. The increasing dimensionality displayed throughout compounds 1?3 is a function of pH and the structure directing influence of TEA (triethylamine) in the case of 2 and 3. Compounds 1 and 2 exhibit similar 2-D configurations, yet each compound offers a different route toward structural assembly: supramolecular noncovalent interactions (1) and direct metal-to-ligand coordination (2). The role of TEA as a template in 2 and 3 was investigated by substituting TEA with alternative species that can potentially serve as structure directing agents: TMA(trimethylamine), TPA (tripropylamine), NaOH_((aq)), and CsOH_((aq)). The formation of compound 4 was observed in the presence of TMA and revealed a different chain motif compared with that observed in 1?3. Luminescence spectra were collected in order to ascertain whether any relationship existed between structural variation and uranyl emission.
机译:水热合成了四个新的UO_2〜(2+)化合物,它们掺入5-硝基-1,3-苯二甲酸(n-bzdc):[(UO_2)(C_8N_1O_6H_3)(H_2O)]·H_2O(1),[(UO_2 )2(C_8N_1O_6H_3)2H_2O]·TEA(2); [(UO_2)2(OH)-(C_8N_1O_6H_3)2]·(TEAH)(H_2O)(3); [(UO_2)(C_8N_1O_6H_3)-(C_8N_1O_6H_4)]·TMAH(4)。化合物1由通过n-bzdc接头桥接形成双链的五角双锥体双氧铀酰单体组成,该结构基序也充当2的2-D层和3的3-D框架的基础。在化合物2和3的情况下,整个化合物1〜3的维数是pH和TEA(三乙胺)的结构指导作用的函数。化合物1和2具有相似的2-D构型,但是每种化合物都提供了通往结构的不同途径组装:超分子非共价相互作用(1)和金属与配体的直接配位(2)。通过用可能潜在用作结构导向剂的替代物质代替TEA,研究了TEA在2和3中作为模板的作用:TMA(三甲胺),TPA(三丙胺),NaOH _((aq))和CsOH _((aq ))。在TMA存在下观察到化合物4的形成,与在1→3中观察到的相比,揭示了不同的链基序。收集发光光谱以确定结构变化与铀酰发射之间是否存在任何关系。

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