The construction of Cu(II)-containing supramolecular chains is achieved by combining suitable anionic ligands (for controlling the coordination geometry and for creating a neutral building block) with four new bifunctional ligands containing a metal-coordinating pyridyl site and a self-complementary hydrogen-bonding moiety. Seven crystal structures are presented and in each case, the copper(II) complex displays a âpaddlewheelâ arrangement, with four carboxylate ligands occupying the equatorial sites, leaving room for the bifunctional ligand to coordinate in the axial positions. The supramolecular chemistry, which organizes the coordination-complexes into the desired infinite 1-D chains, is driven by a combination of NâHâ¯N and NâHâ¯O hydrogen-bonds in five of the seven structures.
通过将合适的阴离子
配体(用于控制配位几何和创建中性构件)与四种新的双功能
配体(包含一个
金属配位
吡啶基位点和一个自互补氢键分子)相结合,可以构建含
铜(II)的超分子链。本文展示了七种晶体结构,每种情况下,
铜(II)配合物都呈现 "桨轮 "排列,四个
羧酸配体占据赤道位点,为双功能
配体在轴向位点配位留出了空间。在七种结构中的五种结构中,NâHâ¯N 和 NâHâ¯O 氢键的组合推动了超分子
化学反应,这种
化学反应将配位复合物组织成所需的无限一维链。