Get access

A Nanoscale Molecular Switch Triggered by Thermal, Light, and Guest Perturbation


  • We thank the Australian Research Council, the protein crystallography beamline staff at the Australian Synchrotron, the Advanced Photon Source supported by the Australian Synchrotron Research Program, funded by the Commonwealth of Australia under the Major National Research Facilities Program, the National Science Foundation/Department of Energy (HE9522232 and CHE0087817) and the Illinois Board of Higher Education, the Argonne National Laboratory supported by the US Department of Energy, Basic Energy Sciences, Office of Science (DE-AC02-06CH11357), the French–Australia FAST/DEST grant, the Aquitaine Region, and Dr. Simon Iremonger for his assistance.


Bottoms up! A discrete metallo-supramolecular nanoball (see picture), synthesized by using “bottom-up” methodologies, uniquely undergoes a solvent-sensitive, physically addressable electronic spin switching. The switching occurs by thermal, light, or solvent perturbation, where importantly it can be switched “on” or “off” by green or red laser irradiation, respectively.

original image