title: Formation and geometrical control of polygon-like metal-coordination assemblies.
abstract: Polygon-like [2+2]- and [3+3]-type metal complexes were prepared from dipyrrin dimers connected by acute-angled spacers. The electrical conduction depends strongly on the packing alignment of the compounds, revealing the presence of effective hopping pathways for holes with relatively high mobility up to 0.11 cm(2)  V(-1)  s(-1) along the aligned axis of [3+3]-type metal-bridged assemblies. These observations correlated with the geometrical control of the π-conjugated metal complexes in the cyclic structures, which enables their ordered arrangement in the assemblies.
authors.affiliation: College of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan. maedahir@ph.ritsumei.ac.jp
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Maeda
authors.forename: Ryo
authors.initials: R
authors.lastname: Akuta
authors.forename: Yuya
authors.initials: Y
authors.lastname: Bando
authors.forename: Kazuto
authors.initials: K
authors.lastname: Takaishi
authors.forename: Masanobu
authors.initials: M
authors.lastname: Uchiyama
authors.forename: Atsuya
authors.initials: A
authors.lastname: Muranaka
authors.forename: Norimitsu
authors.initials: N
authors.lastname: Tohnai
authors.forename: Shu
authors.initials: S
authors.lastname: Seki
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry*; D008024:Ligands; D014961:X-Ray Diffraction
chemical_list: D056831:Coordination Complexes; D008024:Ligands
keywords: N ligands; X-ray diffraction; cyclic compounds; electrical conduction; pyrrole derivatives; supramolecular chemistry