Self-assembly Metal Complex and its Function

研究了含咪唑的多齿席夫碱配体的自组装金属配合物。金属配合物本身表现为一个简单的结构单元，并表现出以下特点：（1）配合物在咪唑氮上具有潜在的给体配位能力，（2）配合物在空位或可取代的配位位点具有潜在的受体配位能力，（3）配合物在咪唑氮上具有潜在的受体配位能力，（4）配合物在咪唑氮上具有潜在的受体配位能力。（3）虽然配合物同时具有潜在的给体和受体配位能力，但在pH低于pK_H的范围内，两种配位能力中的一种或两种都不存在。当pH高于pKH时，质子解离，给体和受体配位能力出现，自组装过程得到促进。在该体系中，通过输入pK_H等外部信息，可以实现从孤立分子到组装分子的构建过程和逆解构过程;（4）由于配体骨架具有空间位阻作用，金属离子具有较好的配位几何构型，因此组装后的分子结构将由配体骨架和金属离子共同决定。

I have studied on the self-assembly metal complexes with the multidentate Schiff base ligand involving an imidazole moiety. My metal complex behaves itself like a simple building block and exhibits the following characteristics (1) the complex has potentially donor coordination ability at the imidazolate nitrogen ; (2) the complex has potentially acceptor coordination ability at the vacant or substitutable coordination site ; (3) Although the complex has potentially both donor and acceptor coordination ability, either or both of two abilities is absent under the pH region lower than the pK_H. When the proton is dissociated under the pH higher than the pK_H, donor and acceptor coordination ability appear and the self-assembly process is promoted. In this system, a construction processes from isolated molecules to assembled molecule and the reverse deconstruction processes are both available by inputting external information such as pK_H ; (4) The resulting assembled molecular structure would be determined cooperatively by ligand framework and metal ion, because the ligand framework can give a steric restriction and metal ion assumes its preferable coordination geometry.