Synthesis of expanded poly(α-amino acid)s having metal complex skeleton and construction of secondary structures

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A series of expanded poly(α-amino acid)s containing metal complexes was designed and synthesized. The molecular structures in solution and the crystal structures were determined. The conformation of the polymer depends finely on the component amino acids. Slight changes of the side chain of amino acid residues resulted in varieties of conformations, e.g., helical and zigzag structures. A suitable select of linkage could alter the handedness of the helix.