Controlled
Sol–Gel Transitions by Actuating
Molecular Machine Based Supramolecular Polymers
Version 3 2018-03-13, 08:14
Version 2 2017-10-13, 08:44
Version 1 2017-03-23, 14:07
Posted on 2018-03-13 - 08:14
The
implementation of artificial molecular machines in polymer
science is an important objective that challenges chemists and physicists
in order to access an entirely new class of smart materials. To design
such systems, the amplification of a mechanical actuation from the
nanoscale up to a macroscopic response in the bulk material is a central
issue. In this article we show that bistable [c2]daisy
chain rotaxanes (i.e., molecular muscles) can be linked into main-chain
Upy-based supramolecular polymers. We then reveal by an in depth quantitative
study that the pH actuation of the mechanically active rotaxane at
the nanoscale influences the physical reticulation of the polymer
chains by changing the supramolecular behavior of the Upy units. This
nanoactuation within the local structure of the main chain polymer
results in a mechanically controlled sol–gel transition at
the macroscopic level.
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Goujon, Antoine; Mariani, Giacomo; Lang, Thomas; Moulin, Emilie; Rawiso, Michel; Buhler, Eric; et al. (2017). Controlled
Sol–Gel Transitions by Actuating
Molecular Machine Based Supramolecular Polymers. ACS Publications. Collection. https://doi.org/10.1021/jacs.7b00983
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AUTHORS (7)
AG
Antoine Goujon
GM
Giacomo Mariani
TL
Thomas Lang
EM
Emilie Moulin
MR
Michel Rawiso
EB
Eric Buhler
NG
Nicolas Giuseppone