Journal of Inclusion Phenomena and Macrocyclic Chemistry

, Volume 68, Issue 1, pp 1–24

Molecular brake systems controlled by light and heat

Review Article

DOI: 10.1007/s10847-010-9748-x

Cite this article as:
Hirose, K. J Incl Phenom Macrocycl Chem (2010) 68: 1. doi:10.1007/s10847-010-9748-x


Machines at a molecular level are in perpetual Brownian motion even at an ambient temperature. One of the representative issues of researches on molecular machines is a development of technology, which can control Brownian motion. This review presents our efforts to achieve the first rationally designed molecular brake systems of threading/dethreading motions, a shuttling motion, and a rocking motion that work reversibly and quantitatively in response to external stimuli without producing any chemical wastes. These molecular brake systems were constructed from a dumbbell shaped secondary ammonium axle and a ring component having photo and thermally reactive moiety.


Host–guest chemistryMolecular recognitionMolecular brakeShuttlingMolecular machineMolecular device

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Division of Frontier Materials Science, Graduate School of Engineering ScienceOsaka UniversityToyonakaJapan