title: Right-handed helical structure of expanded oligo(L-leucine) containing [Ru(terpyridine)2]2+ moieties.
abstract: Expanded oligo(l-leucine)s, containing an alternate arrangement of a bis(terpyridine)ruthenium(II) moiety and a l-leucine residue, were synthesized and characterized by 1H NMR, UV, CD, and electrochemical properties. The intensity of CD spectra per ruthenium unit increased with the elongation of the peptide chain. 1H NMR analysis of a tetramer indicated the right-handed helical structure in acetonitrile.
authors.affiliation: Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Taka-aki
authors.initials: TA
authors.lastname: Okamura
authors.forename: Taku
authors.initials: T
authors.lastname: Iwamura
authors.forename: Shuichiro
authors.initials: S
authors.lastname: Seno
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yamamoto
authors.forename: Norikazu
authors.initials: N
authors.lastname: Ueyama
mesh_terms: D002942:Circular Dichroism; D008958:Models, Molecular; D009842:Oligopeptides / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry*; D017433:Protein Structure, Secondary; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D009842:Oligopeptides; D009942:Organometallic Compounds; D010455:Peptides; D011725:Pyridines; C027819:polyleucine; D012428:Ruthenium