Fig. 4: Threading of the COP-1 nanotube by α,ω-disubstituted n-alkanes. | Nature Synthesis

Fig. 4: Threading of the COP-1 nanotube by α,ω-disubstituted n-alkanes.

From: Synthesis of covalent organic pillars as molecular nanotubes with precise length, diameter and chirality

Fig. 4: Threading of the COP-1 nanotube by α,ω-disubstituted n-alkanes.

a–c, X-ray crystal structures of [Br(CH2)10Br⊂(M)-COP-1] (a), [HO(CH2)12OH⊂(M)-COP-1] (b) and [Br(CH2)9Br⊂(P)-COP-1] (c) inclusion complexes. The COP-1 nanotubes and linear guests are shown in stick and CPK representations, respectively. d,e, Partial solid-state structures of the 1,9-dibromononane thread in fused stick/CPK representation, highlighting the C–Br…π interaction (d) and the torsional angles throughout the backbone (e). Hydrogens of COP-1 are omitted for clarity. C, grey; O, red; N, blue; H, white; Br, brown.

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