6533b873fe1ef96bd12d4b80
RESEARCH PRODUCT
Unravelling the chemical design of spin-crossover nanoparticles based on iron(ii)–triazole coordination polymers: towards a control of the spin transition
Mónica Giménez-marquésMónica Giménez-marquésEugenio CoronadoM. Luisa García-sanz De Larreasubject
chemistry.chemical_classificationMaterials scienceAlloySpin transitionNanoparticleCooperativityNanotechnology02 engineering and technologyGeneral ChemistryPolymerengineering.material010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesMicelle0104 chemical sciencesPulmonary surfactantchemistrySpin crossoverMaterials ChemistryengineeringPhysical chemistry0210 nano-technologydescription
A systematic study of the key synthetic parameters that control the growth of spin-crossover (SCO) nanoparticles (NPs) using the reverse micelle technique has been undertaken in the system [Fe(Htrz)2(trz)](BF4)·H2O, (Htrz = 1,2,4-triazole). This has permitted us to modulate the physical properties of the NPs in a controlled and reproducible manner. In particular, a control over the size of the NPs (in the range 4 to 16 nm) has been achieved by varying the water to surfactant molar ratio. The consequences of this size variation on the cooperativity of the spin transition are discussed. Finally, this approach has been extended to the chemical alloy [Fe(Htrz)2.95(NH2trz)0.05](ClO4)2 in order to prepare NPs exhibiting a cooperative and hysteretic spin transition centred closer to room temperature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 | Journal of Materials Chemistry C |