6533b85ffe1ef96bd12c1aa9

RESEARCH PRODUCT

Thermal and pressure-induced spin crossover in a novel three-dimensional Hoffman-like clathrate complex

Azzedine BousseksouCarlos Bartual-murguiCarlos Bartual-murguiHelena J. ShepherdM. Carmen MuñozGábor MolnárJosé Antonio RealLionel Salmon

subject

Spin statesCondensed matter physicsChemistryHydrostatic pressureSpin transitionGeneral ChemistryTemperature cyclingCrystal structureCatalysissymbols.namesakeSpin crossoverMössbauer spectroscopyMaterials ChemistrysymbolsPhysical chemistryRaman spectroscopy

description

The synthesis and crystal structure of the interpenetrated metal–organic framework material Fe(bpac)2[Ag(CN)2]2 (bpac = 4,4′-bis(pyridyl)acetylene) are reported along with the characterization of its spin crossover properties by variable temperature magnetometry and Mossbauer spectroscopy. The complex presents an incomplete stepped spin transition as a function of temperature that is modified upon successive thermal cycling. The pressure-induced transition has also been investigated by means of high pressure Raman spectroscopy using a diamond anvil cell. The results show that it is possible to reach the thermally-inaccessible fully low spin state at room temperature by applying hydrostatic pressure to the sample.

https://doi.org/10.1039/c0nj00845a