Sub-nanoscale, single-molecule, magnetic-electronic switching from externally perturbed spin states in iron (III)-based complexes

The temperature and pressure dependent spin state transition behavior of two Fe(III)-based complexes were analyzed. Temperature and pressure dependent spin-spin relaxation was used to account for the pressure evolution of the asymmetric quadrupole split resonance profile. Density functional theory calculations, in conjuction with crystallographic data were also used to consider the structural response to spin state variation. The possibility of a mechanically operated single-molecule magnetic switch was also suggested.