Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes
Two different coupling strategies were employed to create ErIII single-molecule magnets (SMMs) using high blocking temperature mononuclear precursors. The magnetic properties of three lanthanide–COT complexes, [ErIII2(COT′′)3] (1) (COT′′ = 1,4-bis(trimethylsilyl)cyclooctatetraenyl dianion) and K2(TH...
| Main Authors: | , , , , |
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| Format: | Journal article |
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American Chemical Society
2014
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| _version_ | 1797059292643196928 |
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| author | le Roy, J Ungur, L Korobkov, I Chibotaru, L Murugesu, M |
| author_facet | le Roy, J Ungur, L Korobkov, I Chibotaru, L Murugesu, M |
| author_sort | le Roy, J |
| collection | OXFORD |
| description | Two different coupling strategies were employed to create ErIII single-molecule magnets (SMMs) using high blocking temperature mononuclear precursors. The magnetic properties of three lanthanide–COT complexes, [ErIII2(COT′′)3] (1) (COT′′ = 1,4-bis(trimethylsilyl)cyclooctatetraenyl dianion) and K2(THF)4[LnIII2(COT)4] (Ln = Gd (2), Er (3); THF = tetrahydrofuran, COT = cyclooctatetraenyl dianion), are reported. Both ErIII complexes behave as SMMs and exhibit magnetic hysteresis at 12 K in solid state. In solution compound 1 exhibits hysteresis up to 14 K. Ac susceptibility data indicates a 100 s blocking temperature of 12.5 and 12.9 K for [ErIII2(COT′′)3] and K2(THF)4[ErIII2(COT)4], respectively. Both ErIII dimers display enhanced SMM properties over their mononuclear analogues due to their linear structure and strictly axial anisotropy. A 4 K increase in the magnetic blocking temperature of [ErIII2(COT′′)3] over the double-decker analogue is attributed to an additional mechanism of magnetization blocking arising from exchange coupling between ErIII ions. |
| first_indexed | 2024-03-06T20:02:08Z |
| format | Journal article |
| id | oxford-uuid:27abef99-3706-492c-a093-772f73584fd2 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:02:08Z |
| publishDate | 2014 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:27abef99-3706-492c-a093-772f73584fd22022-03-26T12:08:21ZCoupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:27abef99-3706-492c-a093-772f73584fd2Symplectic Elements at OxfordAmerican Chemical Society2014le Roy, JUngur, LKorobkov, IChibotaru, LMurugesu, MTwo different coupling strategies were employed to create ErIII single-molecule magnets (SMMs) using high blocking temperature mononuclear precursors. The magnetic properties of three lanthanide–COT complexes, [ErIII2(COT′′)3] (1) (COT′′ = 1,4-bis(trimethylsilyl)cyclooctatetraenyl dianion) and K2(THF)4[LnIII2(COT)4] (Ln = Gd (2), Er (3); THF = tetrahydrofuran, COT = cyclooctatetraenyl dianion), are reported. Both ErIII complexes behave as SMMs and exhibit magnetic hysteresis at 12 K in solid state. In solution compound 1 exhibits hysteresis up to 14 K. Ac susceptibility data indicates a 100 s blocking temperature of 12.5 and 12.9 K for [ErIII2(COT′′)3] and K2(THF)4[ErIII2(COT)4], respectively. Both ErIII dimers display enhanced SMM properties over their mononuclear analogues due to their linear structure and strictly axial anisotropy. A 4 K increase in the magnetic blocking temperature of [ErIII2(COT′′)3] over the double-decker analogue is attributed to an additional mechanism of magnetization blocking arising from exchange coupling between ErIII ions. |
| spellingShingle | le Roy, J Ungur, L Korobkov, I Chibotaru, L Murugesu, M Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title | Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title_full | Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title_fullStr | Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title_full_unstemmed | Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title_short | Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes |
| title_sort | coupling strategies to enhance single molecule magnet properties of erbium cyclooctatetraenyl complexes |
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