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. 2007 Nov 21;129(46):14187-9.
doi: 10.1021/ja073744m. Epub 2007 Oct 27.

A highly efficient approach to the self-assembly of hexagonal cavity-cored tris[2]pseudorotaxanes from several components via multiple noncovalent interactions

Hai-Bo Yang  1 , Koushik Ghosh, Brian H Northrop, Yao-Rong Zheng, Matthew M Lyndon, David C Muddiman, Peter J Stang
Affiliations

A highly efficient approach to the self-assembly of hexagonal cavity-cored tris[2]pseudorotaxanes from several components via multiple noncovalent interactions

Hai-Bo Yang et al. J Am Chem Soc. .
No abstract available

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Figures

Figure 1
Figure 1
Molecular structures of 1 – 4, as well as a graphical representation of the self-assembly of hexagonal tris-DB24C8 derivatives 5 and 6 (Method I, step I), pseudorotaxane 9 (Method II, step I), and tris[2]pseudorotaxanes 7 and 8 (Methods I and II, step n).
Figure 2
Figure 2
Partial 1HNMR spectra recorded at 500 MHz (CD2C12,298 K) of (A) dibenzylammonium 4, (B) precursor 1, (C) hexagonal tris-DB24C8 derivative 5, and (D) tris[2]pseudorotaxane 7 (>95%), along with some signals for partially complexed, and uncomplexed species at equilibrium.
Figure 3
Figure 3
ESI-TOF-MS spectra of hexagonal tris-DB24C8 derivative 5 (Vertical lines are the theoretical abundances).
Figure 4
Figure 4
Calculated (top) and experimental (bottom) ESI-MS spectra of tris[2]pseudorotaxanes 7 (A) and 8 (B).
Figure 5
Figure 5
The 1H NMR titration isotherm of tris[2]pseudorotaxane 8 recorded at 500 MHz in CD2C12 at 298 K (▪ indicates the change in chemical shift of the proton signal corresponding to the γ-H of the crown ether).
Figure 6
Figure 6
Schematic representation of the one-pot self-assembly of tris[2]pseudorotaxanes 7 and 8 by using Method III.
Figure 7
Figure 7
Simulated molecular model of tris[2]pseudorotaxane 8 optimized with the MMFF force-field. Color scheme: C = gray, O = red, N = blue, P = purple, Pt = yellow, and R2NH2+ hydrogen atoms = white, all other hydrogen atoms have been removed for clarity.
See this image and copyright information in PMC

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