03 Aug 12:59
by Bao-Nguyen T. Nguyen, John D. Thoburn, Angela B. Grommet, Duncan J. Howe, Tanya K. Ronson, Hugh P. Ryan, Jeanne L. Bolliger, and Jonathan R. Nitschke
Journal of the American Chemical Society
DOI: 10.1021/jacs.1c04799
21 Jul 08:37
by Martina Canton, Jessica Groppi, Lorenzo Casimiro, Stefano Corra, Massimo Baroncini, Serena Silvi, and Alberto Credi
Journal of the American Chemical Society
DOI: 10.1021/jacs.1c06027
30 Jun 10:14
by Yitao Wu,
Liqing Shangguan,
Qi Li,
Jiajun Cao,
Yang Liu,
Zeju Wang,
Huangtianzhi Zhu,
Feng Wang,
Feihe Huang
We report a novel polypseudorotaxane [H⋅G⋅Ag]
n
as synergistically driven by host–guest complexation and metal-coordination interactions. It depolymerizes into a [3]pseudorotaxane H
2
⋅G⋅Ag2
⋅acetone2 upon addition of H and AgSF6, while it reforms with successive addition of G. The transformations between [H⋅G⋅Ag]
n
and H
2
⋅G⋅Ag2
⋅acetone2 can be switched for infinite cycles.
Abstract
Chemoresponsive supramolecular systems with infinite switching capability are important for applications in recycled materials and intelligent devices. To attain this objective, here a chemoresponsive polypseudorotaxane is reported on the basis of a bis(p-phenylene)-34-crown-10 macrocycle (H) and a cyano-substituted viologen guest (G). H and G form a [2]pseudorotaxane (H⊃G) both in solution and in the solid state. Upon addition of AgSF6, a polypseudorotaxane (denoted as [H⋅G⋅Ag]
n
) forms as synergistically driven by host–guest complexation and metal-coordination interactions. [H⋅G⋅Ag]
n
depolymerizes into a [3]pseudorotaxane (denoted as H
2
⋅G⋅Ag2
⋅acetone2) upon addition of H and AgSF6, while it reforms with successive addition of G. The transformations between [H⋅G⋅Ag]
n
and H
2
⋅G⋅Ag2
⋅acetone2 can be switched for infinite cycles, superior to the conventional chemoresponsive supramolecular polymeric systems with limited switching capability.
Open Access
  This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
