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Ni(II)-mediated self-assembly of artificial β-dipeptides forming a macrocyclic tetranuclear complex with interior spaces for in-line molecular arrangement

Journal of the American Chemical Society, ISSN: 0002-7863, Vol: 130, Issue: 17, Page: 5646-5647
2008
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Article Description

Metal-mediated self-assembly of bioinspired molecular building blocks shows promise as an excellent strategy to provide well-defined metal arrays and nanoscopic metallo-architectures in a programmable way. Herein, we report Ni(II)-mediated self-assembly of artificial β-dipeptides (1) which were prepared from a newly designed β-amino acid bearing a propanediamine ligand as the side chain. The β-dipeptide (1) has thus two sets of ligands, that is, each building block serves as a tridentate ligand with a bidentate propanediamine unit and an amide carbonyl group. Both C- and N-terminal tridentate ligands in 1 bind to two Ni(II) ions independently, and consequently, four β-dipeptides are circularly arranged in a head-to-tail fashion to form a macrocyclic tetranuclear Ni(II) complex, Ni1(ClO)(HO). The cyclic structure was determined by X-ray analysis and ESI-TOF mass spectrometry. The resulting unique twisted-boat structure allows the formation of isolated spaces for in-line hydrogen-bonded arrangement of water and anion molecules within a hole and two grooves rich in hydrogen bonding groups. Copyright © 2008 American Chemical Society.

Bibliographic Details

Miyake, Ryosuke; Tashiro, Shohei; Shiro, Motoo; Tanaka, Kentaro; Shionoya, Mitsuhiko

American Chemical Society (ACS)

Chemical Engineering; Chemistry; Biochemistry, Genetics and Molecular Biology

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