Energetically demanding transport in a supramolecular assembly

Chuyang Cheng; Paul R. McGonigal; Wei Guang Liu; Hao Li; Nicolaas A. Vermeulen; Chenfeng Ke; Marco Frasconi; Charlotte L. Stern; William A. Goddard; J. Fraser Stoddart

doi:10.1021/ja508615f

Energetically demanding transport in a supramolecular assembly

Chuyang Cheng, Paul R. McGonigal, Wei Guang Liu, Hao Li, Nicolaas A. Vermeulen, Chenfeng Ke, Marco Frasconi, Charlotte L. Stern, William A. Goddard, J. Fraser Stoddart

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

A challenge in contemporary chemistry is the realization of artificial molecular machines that can perform work in solution on their environments. Here, we report on the design and production of a supramolecular flashing energy ratchet capable of processing chemical fuel generated by redox changes to drive a ring in one direction relative to a dumbbell toward an energetically uphill state. The kinetics of the reaction pathway juxtapose a low energy [2]pseudorotaxane that forms under equilibrium conditions with a high energy, metastable [2]pseudorotaxane which resides away from equilibrium.

Original language	English (US)
Pages (from-to)	14702-14705
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	136
Issue number	42
DOIs	https://doi.org/10.1021/ja508615f
State	Published - Oct 22 2014

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© 2014 American Chemical Society.

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AU - Cheng, Chuyang

AU - McGonigal, Paul R.

AU - Liu, Wei Guang

AU - Li, Hao

AU - Vermeulen, Nicolaas A.

AU - Ke, Chenfeng

AU - Frasconi, Marco

AU - Stern, Charlotte L.

AU - Goddard, William A.

AU - Stoddart, J. Fraser

PY - 2014/10/22

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AB - A challenge in contemporary chemistry is the realization of artificial molecular machines that can perform work in solution on their environments. Here, we report on the design and production of a supramolecular flashing energy ratchet capable of processing chemical fuel generated by redox changes to drive a ring in one direction relative to a dumbbell toward an energetically uphill state. The kinetics of the reaction pathway juxtapose a low energy [2]pseudorotaxane that forms under equilibrium conditions with a high energy, metastable [2]pseudorotaxane which resides away from equilibrium.

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Energetically demanding transport in a supramolecular assembly

Abstract

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