Design And Synthesis Of Double-helical Polymetallic Complexes

Self-assembly and molecular recognition appear to be essential factors for the construction of supramolecular architectures utilizing the formation of non-covalent bonds in solutions. The use of metal ions with specific preferences for particular coordination geometries has been developed in order to produce structurally elaborate metallo-supramolecular complexes. Double-helical molecular architectures retain a unique fascination because life itself in encoded within double helical DNA arrays. The assembly of synthetic double-helical architectures through metallo-supramolecular design has been an area of intense activity and the construction principles necessary to assemble a double-helix are now fairly well established. However challenges in defining the precise topography or conformation of the helical superstructure remain and predicting the outcome of self-assembly process is difficult and dependent upon numerous factors. Thus versatile ligands with aromatic spacer groups and other flexible submotifs with weak intramolecular face-to-face and edge-to-faceπ....πinteraction as building blocks for metal-assisted self-assembly of helical architectures have demonstrated. In this thesis we want to design and synthesize some new kinds of bis-bidentate ligands to assembly transition metal complexes with helical structures, to determine their crystal structure and to study the complex properties in solution. We totally synthesized 25 new types of diketone, ketoimine and Schiff base bridging...