American Chemical Society
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Synthesis and Structure of Cyclic Oligo(p-phenylene oxide)s,  −(C6H4O)n− (n = 6−10)

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journal contribution
posted on 2006-10-27, 00:00 authored by Daisuke Takeuchi, Itaru Asano, Kohtaro Osakada
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.