title: A lead (II) 3D coordination polymer based on a marine cyclic peptide motif.
abstract: The crystal structure of a naturally occurring cyclic tetrapeptide cyclo(Gly-L-Ser-L-Pro-L-Glu) [cyclo(GSPE)] was obtained. The conformation of synthesized cyclo(GSPE) fixes the coordination to lead ion in a 1:1 ratio. This cyclo(GSPE)-Pb complex was constructed as an asymmetric 3D network in the crystalline state. The polymerization of a heavy metal ion with a rigid asymmetric cyclic tetrapeptide represents the first example of a new class of macrocyclic complexes.
authors.affiliation: Department of Chemistry, National Dong-Hwa University, Hualien 974, Taiwan.
authors.forename: Subrata
authors.initials: S
authors.lastname: Chakraborty
authors.forename: Pooja
authors.initials: P
authors.lastname: Tyagi
authors.forename: Dar-Fu
authors.initials: DF
authors.lastname: Tai
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.forename: Shie-Ming
authors.initials: SM
authors.lastname: Peng
mesh_terms: D020816:Amino Acid Motifs; D018360:Crystallography, X-Ray; D007854:Lead / Q000737:chemistry*; D009842:Oligopeptides / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D009842:Oligopeptides; D007854:Lead