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RESEARCH PRODUCT

A Switchable Molecular Rotator: Neutron Spectroscopy Study on a Polymeric Spin-Crossover Compound

Miguel CastroRyo OhtaniM. Carmen MuñozAna B. GasparJosé Antonio RealNobuhiro YanaiKo YonedaMotohiro MizunoMasaaki OhbaHideo AndoYuh HijikataSusumu KitagawaJ. Alberto Rodríguez-velamazánMiguel A. González

subject

Spin statesPyrazineFrameworkNanotechnologyBiochemistryCrystalsCatalysischemistry.chemical_compoundColloid and Surface ChemistrySpin crossoverPorous Coordination PolymersMoleculeSpectroscopyChemistryGeneral ChemistryNeutron spectroscopyDynamicsCrystallographyRotorsFISICA APLICADAQuasielastic neutron scatteringTransitionProton NMRMachinesCondensed Matter::Strongly Correlated ElectronsRoom-TemperatureState

description

A quasielastic neutron scattering and solid-state 2H NMR spectroscopy study of the polymeric spin-crossover compound {Fe(pyrazine)[Pt(CN) 4]} shows that the switching of the rotation of a molecular fragment-the pyrazine ligand-occurs in association with the change of spin state. The rotation switching was examined on a wide time scale (10 -13-10 -3 s) by both techniques, which clearly demonstrated the combination between molecular rotation and spin-crossover transition under external stimuli (temperature and chemical). The pyrazine rings are seen to perform a 4-fold jump motion about the coordinating nitrogen axis in the high-spin state. In the low-spin state, however, the motion is suppressed, while when the system incorporates benzene guest molecules, the movements of the system are even more restricted. © 2012 American Chemical Society.

yearjournalcountryeditionlanguage
2012-01-01
10.1021/ja206228nhttps://doi.org/10.1021/ja206228n