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Keywords:

  • Brownian ratchets;
  • dynamic covalent chemistry;
  • molecular devices;
  • molecular motors;
  • photochemistry
Thumbnail image of graphical abstract

Walk this way! A walker unit is able to walk in either direction along a four-foothold molecular track, depending on the sequence of application of four external stimuli: acid, base, UV light, and visible light in the presence of iodine (see picture). The isomerization of the stilbene moiety in the molecular track is key for the achievement of directional transport through a Brownian ratchet mechanism.