The Deposition of Metallopeptide-Based Coordination Polymers on Graphite Substrates: Effects of Side-Chain Functional Groups and Local Surface Structure


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The surface dictates: The metallodipeptide complex [{Zn(Dpg-Tyr-O)}n]n+ (Dpg=dipicolylglycyl, Tyr=tyrosine) is a right-handed homochiral helical coordination polymer. Depending on the local structure of a pyrolytic graphite surface, it aggregates to form double-helical plaits (left) or two-dimensional assemblies of linearly stretched strands (right). The strands represent the first step in the formation of a three-dimensional crystal.