title: Synthesis and structure of cyclic oligo(p-phenylene oxide)s, -(C6H4O)n- (n = 6-10).
abstract: Stepwise growth of oligo(p-phenylene oxide)s and cyclization via the Ullmann coupling reaction by using CuI/N,N-dimethylglycine afforded cyclic oligo(p-phenylene oxide)s, (n = 6-10). The structure of the new cyclophanes was determined by X-ray crystallography, which revealed that they have planar or slightly bent structures with diameters of 1.0-1.5 nm.
authors.affiliation: Chemical Resources Laboratory (Mail Box R1-03), Tokyo Institute of Technology, 4259 Nagatsuda, Midori-ku, Yokohama 226-8503, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Takeuchi
authors.forename: Itaru
authors.initials: I
authors.lastname: Asano
authors.forename: Kohtaro
authors.initials: K
authors.lastname: Osakada