Search results for "Photomagnetic effect"

showing 2 items of 2 documents

On/Off Photoswitching in a Cyanide-Bridged {Fe2Co2} Magnetic Molecular Square

2013

International audience; A repeatable bidirectional paramagnetic ↔ diamagnetic photomagnetic effect has been observed in the cyanide-bridged Fe-Co square complex {[Fe{B(pz)(4)}(CN)(3)](2)[Co(bik)(2)](2)}(ClO(4))(2)*3H(2)O [B(pz)(4) = tetrapyrazolylborate, bik = bis(1-methylimidazol-2-yl)ketone]. Magnetic measurements and low-temperature single-crystal X-ray diffraction experiments have shown that a complete electron transfer from the diamagnetic Fe(II)-Co(III) state to the paramagnetic Fe(III)-Co(II) metastable state is induced by 808 nm laser light irradiation, whereas the diamagnetic state is recovered in an almost quantitative yield under irradiation at 532 nm.

CyanideINDUCED ELECTRON-TRANSFERTRANSITIONSRELAXATION010402 general chemistryPhotochemistry01 natural sciencesBiochemistryCOBALT-IRON CYANIDECatalysisPHOTOINDUCED MAGNETIZATIONParamagnetismchemistry.chemical_compoundElectron transferColloid and Surface ChemistryMetastability[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular BiologyIrradiationALKALI-METAL-IONPRUSSIAN BLUE ANALOGS010405 organic chemistryChemistryRelaxation (NMR)Photomagnetic effectGeneral Chemistry3. Good health0104 chemical sciencesCOSOLID-STATECrystallographyDiamagnetismJournal of the American Chemical Society
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Photomagnetic effect in a cyanide-bridged mixed-valence {FeII2FeIII2} molecular square

2012

The self-assembly of [Fe(III)(Tp)(CN)(3)](-) and [Fe(II)(bik)(2)(S)(2)](2+) affords the cyanide-bridged mixed valence {Fe(III)(2)Fe(II)(2)}(2+) molecular square, which exhibits a photomagnetic effect under laser light irradiation at low temperature and also shows thermal spin-state conversion near ambient temperature.

Valence (chemistry)Condensed matter physicsCyanideMetals and AlloysAnalytical chemistryPhotomagnetic effectGeneral ChemistryCatalysisSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryThermalMaterials ChemistryCeramics and CompositesIrradiationLaser lightChemical Communications
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