• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Exploring Supramolecular Self-Assembly of Tetraarylporphyrins by Halogen Bonding: Crystal Engineering with Diversely Functionalized Six-Coordinate Tin(L)_2-Porphyrin Tectons
【24h】

Exploring Supramolecular Self-Assembly of Tetraarylporphyrins by Halogen Bonding: Crystal Engineering with Diversely Functionalized Six-Coordinate Tin(L)_2-Porphyrin Tectons

机译：通过卤素键研究四芳基卟啉的超分子自组装：具有多种功能的六坐标锡（L）_2-卟啉构造子的晶体工程。

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

This study targets the construction of porphyrin assemblies directed by halogen bonds, by utilizing a series of purposely synthesized Sn(axial ligand)_2-(5,10,15,20-tetraarylporphyrin) [Sn(L)_2-TArP] complexes as building units. The porphyrin moiety and the axial ligands in these compounds contain different combinations of complimentary molecular recognition functions. The former bears p-iodophenyl, p-bromophenyl, 4'-pyridyl, or 3'-pyridyl substituents at the meso positions of the porphyrin ring. The latter comprises either a carboxylate or hydroxy anchor for attachment to the porphyrin-inserted tin ion and a pyridyl-, benzotriazole-, or halophenyl-type aromatic residue as the potential binding site. The various complexes were structurally analyzed by single-crystal X-ray diffraction, accompanied by computational modeling evaluations. Halogenbonding interactions between the lateral aryl substituents of one unit of the porphyrin complex and the axial ligands of neighboring moieties was successfully expressed in several of the resulting samples. Their occurrence is affected by structural (for example, specific geometry of the six-coordinate complexes) and electronic effects (for example, charge densities and electrostatic potentials). The shortest intermolecular I…N halogen-bonding distance of 2.991 A was observed between iodophenyl (porphyrin) and benzotriazole (axial ligand) moieties. Manifestation of halogen bonds in these relatively bulky compounds without further activation of the halophenyl donor groups by electron-withdrawing substituents is particularly remarkable.
机译：这项研究的目标是通过利用一系列有意合成的Sn（轴向配体）_2-（5,10,15,20-四芳基卟啉）[Sn（L）_2-TArP]配合物构建由卤素键定向的卟啉组装体单位。这些化合物中的卟啉部分和轴向配体包含互补的分子识别功能的不同组合。前者在卟啉环的内消旋位置带有对-碘苯基，对-溴苯基，4'-吡啶基或3'-吡啶基取代基。后者包含用于连接到插入卟啉的锡离子的羧酸盐或羟基锚，以及吡啶基，苯并三唑或卤代苯基型芳族残基作为潜在的结合位点。通过单晶X射线衍射对各种配合物进行结构分析，并伴有计算模型评估。卟啉配合物的一个单元的侧向芳基取代基与相邻部分的轴向配体之间的卤素键相互作用已成功地在几个所得样品中表达。它们的出现受到结构（例如，六坐标配合物的特定几何形状）和电子效应（例如，电荷密度和静电势）的影响。在碘苯基（卟啉）和苯并三唑（轴向配体）部分之间观察到最短的分子间I…N卤素键距离为2.991A。在这些相对大的化合物中表现出卤素键而没有通过吸电子取代基进一步激活卤代苯基供体基团是特别显着的。

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