Energetically demanding transport in a supramolecular assembly

J Am Chem Soc. 2014 Oct 22;136(42):14702-5. doi: 10.1021/ja508615f. Epub 2014 Oct 10.

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.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Models, Molecular
  • Molecular Conformation
  • Oxidation-Reduction
  • Pyridinium Compounds / chemistry
  • Rotaxanes / chemistry*
  • Thermodynamics

Substances

  • Pyridinium Compounds
  • Rotaxanes