An investigation of photo- and pressure-induced effects in a pair of isostructural two-dimensional spin-crossover framework materials
hal.structure.identifier | School of Chemistry | |
dc.contributor.author | SCIORTINO, Natasha F. | |
hal.structure.identifier | School of Chemistry | |
dc.contributor.author | NEVILLE, Suzanne M. | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | DESPLANCHES, Cédric | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | LÉTARD, Jean-François | |
hal.structure.identifier | Instituto de Ciencia Molecular [ICMol] | |
dc.contributor.author | MARTINEZ, Victor | |
hal.structure.identifier | Instituto de Ciencia Molecular [ICMol] | |
dc.contributor.author | REAL, José Antonio | |
hal.structure.identifier | School of Chemistry | |
dc.contributor.author | MOUBARAKI, Boujemaa | |
hal.structure.identifier | School of Chemistry | |
dc.contributor.author | MURRAY, Keith S. | |
hal.structure.identifier | School of Chemistry | |
dc.contributor.author | KEPERT, Cameron J. | |
dc.date.issued | 2014 | |
dc.identifier.issn | 0947-6539 | |
dc.description.abstractEn | Two new isostructural iron(II) spin-crossover (SCO) framework (SCOF) materials of the type [Fe(dpms)2 (NCX)2 ] (dpms=4,4'-dipyridylmethyl sulfide; X=S (SCOF-6(S)), X=Se (SCOF-6(Se))) have been synthesized. The 2D framework materials consist of undulating and interpenetrated rhomboid (4,4) nets. SCOF-6(S) displays an incomplete SCO transition with only approximately 30 % conversion of high-spin (HS) to low-spin iron(II) sites over the temperature range 300-4 K (T1/2 =75 K). In contrast, the NCSe(-) analogue, SCOF-6(Se), displays a complete SCO transition (T1/2 =135 K). Photomagnetic characterizations reveal quantitative light- induced excited spin-state trapping (LIESST) of metastable HS iron(II) sites at 10 K. The temperature at which the photoinduced stored information is erased is 58 and 50 K for SCOF-6(S) and SCOF-6(Se), respectively. Variable-pressure magnetic measurements were performed on SCOF-6(S), revealing that with increasing pressure both the T1/2 value and the extent of spin conversion are increased; with pressures exceeding 5.2 kbar a complete thermal transition is achieved. This study confirms that kinetic trapping effects are responsible for hindering a complete thermally induced spin transition in SCOF-6(S) at ambient pressure due to an interplay between close T1/2 and T(LIESST) values. | |
dc.language.iso | en | |
dc.publisher | Wiley-VCH Verlag | |
dc.subject.en | Chalcogens | |
dc.subject.en | Coordination polymers | |
dc.subject.en | Iron | |
dc.subject.en | Magnetic properties | |
dc.subject.en | Spin crossover | |
dc.title.en | An investigation of photo- and pressure-induced effects in a pair of isostructural two-dimensional spin-crossover framework materials | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1002/chem.201400367 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Chemistry - A European Journal | |
bordeaux.page | 7448-7457 | |
bordeaux.volume | 20 | |
bordeaux.issue | 24 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-01003836 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-01003836v1 | |
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