Elucidating the mechanism of a two-step spin transition in a nanoporous metal−organic framework
| hal.structure.identifier | School of Chemistry | |
| hal.structure.identifier | Material Science Division [ANL] [MSD] | |
| dc.contributor.author | HALDER, Gregory J. | |
| hal.structure.identifier | X-ray Science Division [XSD] | |
| dc.contributor.author | CHAPMAN, Karena W. | |
| hal.structure.identifier | School of Chemistry | |
| dc.contributor.author | NEVILLE, Suzanne M. | |
| 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 | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LÉTARD, Jean-François | |
| hal.structure.identifier | School of Chemistry | |
| dc.contributor.author | KEPERT, Cameron J. | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 0002-7863 | |
| dc.description.abstractEn | The nanoporous metal−organic framework, Fe(bpe)<sub>2</sub>(NCS)<sub>2</sub>·3(acetone), <b>SCOF-4(Ac)</b> (where bpe is 1,2-bis(4′-pyridyl)ethane), displays a two-step spin crossover (SCO) transition (65−155 K) that is sensitive to the presence of acetone guest molecules. Structural analyses have revealed a structural phase transition, from tetragonal (<i>P</i>2<sub>1</sub><i>c</i>) to orthorhombic (<i>P</i>2<sub>1</sub>2<sub>1</sub>2), associated with the spin transition that defines a checkerboard-like ordering of spin sites at the high-spin:low-spin plateau. The reversible desorption of the acetone guest species is accompanied by a complex series of structural phase transitions that describe a dramatic flexing of the structure. The thermal trapping of a metastable state with 20−25% high-spin character was observed both magnetically and structurally upon rapid quenching of <b>SCOF-4(Ac)</b> to 10 and 25 K, respectively. The light-induced excited spin state trapping (LIESST) effects for <b>SCOF-4(Ac)</b> show a 55% excitation of a metastable HS state at 10 K and a characteristic <i>T</i>(LIESST) value of 52 K. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | Spin transition | |
| dc.subject.en | Nanoporous materials | |
| dc.subject.en | Framework | |
| dc.subject.en | Metal | |
| dc.subject.en | Organic compounds | |
| dc.title.en | Elucidating the mechanism of a two-step spin transition in a nanoporous metal−organic framework | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/ja8068038 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of the American Chemical Society | |
| bordeaux.page | 17552-17562 | |
| bordeaux.volume | 130 | |
| bordeaux.issue | 51 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00373289 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00373289v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20the%20American%20Chemical%20Society&rft.date=2008&rft.volume=130&rft.issue=51&rft.spage=17552-17562&rft.epage=17552-17562&rft.eissn=0002-7863&rft.issn=0002-7863&rft.au=HALDER,%20Gregory%20J.&CHAPMAN,%20Karena%20W.&NEVILLE,%20Suzanne%20M.&MOUBARAKI,%20Boujemaa&MURRAY,%20Keith%20S.&rft.genre=article |
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