Bottom-up Synthesis and
Thread-in-Bead Structures
of Finite (<i>n</i>,0)-Zigzag Single-Wall Carbon Nanotubes
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Abstract
The last remaining synthetic target of finite single-wall
carbon
nanotube models, the zigzag nanotube, has been accomplished through
bottom-up chemical synthesis. The zigzag nanotube was synthetically
accessible without constructing long-sought yet elusive cyclacene
structures but with a cycloarylene structure by devising its cutout
positions. The persistent tubular shape was also perfected in this
last model by cyclization of zigzag-shaped aromatic molecules with
a synchronous topological arrangement. The crystal structure of this
nanotube further revealed an entangled supramolecular assembly, which
showed a novel way to align nanotube molecules by utilizing their
open-end functional groups in a thread-in-bead molecular assembly