Finite phenine nanotubes with periodic vacancy defects

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Science  11 Jan 2019:
Vol. 363, Issue 6423, pp. 151-155
DOI: 10.1126/science.aau5441

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Toward nanotubes with periodic gaps

Carbon nanotubes consist of a continuous array of benzene rings fused along their edges. It is not straightforward to excise regular fragments in a top-down fashion to produce periodic gaps. Sun et al. showcase the beginnings of a bottom-up strategy toward this end. They used borylations and catalytic cross-coupling chemistry to prepare a discrete cylindrical carbon compound composed of 40 benzene rings bonded to one another at the 1, 3, and 5 positions to leave regular void spaces in the walls. Catenation of multiple similar segments could ultimately lead to an extended nanotube with periodic wall defects.

Science, this issue p. 151