Self-assembly Metal Complex and its Function

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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.