6533b829fe1ef96bd128af24
RESEARCH PRODUCT
A reversible hydrogen‐bond isomerization triggered by an abrupt spin crossover near room temperature.
Carlos Giménez-saizVerónica Jornet-molláFrancisco M. RomeroDmitry S. YufitJudith A. K. Howardsubject
Hydrogen bondChemistryOrganic ChemistrySupramolecular chemistryGeneral ChemistryThermomagnetic convectionKinetic energyCatalysisIonCrystallographychemistry.chemical_compoundSpin crossoverPyridineIsomerizationdescription
The spin crossover salt [Fe(bpp) 2 ](isonicNO) 2 ·2.4H 2 O ( 1 ·2.4H 2 O) (bpp = 2,6‐bis(pyrazol‐3‐yl)pyridine; isonicNO = isonicotinate N‐oxide anion) exhibits a very abrupt spin crossover at T 1 /2 = 274.4 K. This triggers a supramolecular linkage (H‐bond) isomerization that responds reversibly towards light irradiation or temperature change. Isotopic effects in the thermomagnetic behaviour reveal the importance of hydrogen bonds in defining the magnetic state. Further, the title compound can be reversibly dehydrated to afford 1 , a material that also exhibits spin crossover coupled to H‐bond isomerization, leading to strong kinetic effects in the thermomagnetic properties.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-08-06 |