Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes
Rare-earth-metal (M = Nd, Gd and Dy) complexes of the organic monoradicals, 15-crown-5-phenyl nitronyl nitroxide 1 and 15-crown-5- or 18-crown-6-phenyl iminonitroxide 2, were synthesized. We present here magnetic properties of the metal-free radicals and the metal complexes of these organic monoradi...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2012
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| _version_ | 1797070725035589632 |
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| author | Sugano, T Blundell, S Hayes, W Tajima, H Mori, H |
| author_facet | Sugano, T Blundell, S Hayes, W Tajima, H Mori, H |
| author_sort | Sugano, T |
| collection | OXFORD |
| description | Rare-earth-metal (M = Nd, Gd and Dy) complexes of the organic monoradicals, 15-crown-5-phenyl nitronyl nitroxide 1 and 15-crown-5- or 18-crown-6-phenyl iminonitroxide 2, were synthesized. We present here magnetic properties of the metal-free radicals and the metal complexes of these organic monoradicals studied using SQUID megnetometry. Almost of all the rare-earth-metal complexes show two-sublattice behavior in a wide range of antiferromagnetic (AFM) intrasublattice and ferromagnetic (FM) intersublattice interactions, Γ and λ, with |CΓ | and |Cλ | ≅ 10 to 100 K (C is the Curie constant) over the temperature range between 1.8 and 300 K, while the metal-free radicals exhibit only weak AFM intermolecular interactions, less than the Weiss constant θ = -1 K. The magnitude of interactions observed in the metal complexes of each radical increase in order from Gd to Dy to Nd complexes. © 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim. |
| first_indexed | 2024-03-06T22:43:05Z |
| format | Journal article |
| id | oxford-uuid:5c443a62-50a1-4f1f-a8cc-5e2e4d47eaf3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:43:05Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:5c443a62-50a1-4f1f-a8cc-5e2e4d47eaf32022-03-26T17:27:02ZMagnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5c443a62-50a1-4f1f-a8cc-5e2e4d47eaf3EnglishSymplectic Elements at Oxford2012Sugano, TBlundell, SHayes, WTajima, HMori, HRare-earth-metal (M = Nd, Gd and Dy) complexes of the organic monoradicals, 15-crown-5-phenyl nitronyl nitroxide 1 and 15-crown-5- or 18-crown-6-phenyl iminonitroxide 2, were synthesized. We present here magnetic properties of the metal-free radicals and the metal complexes of these organic monoradicals studied using SQUID megnetometry. Almost of all the rare-earth-metal complexes show two-sublattice behavior in a wide range of antiferromagnetic (AFM) intrasublattice and ferromagnetic (FM) intersublattice interactions, Γ and λ, with |CΓ | and |Cλ | ≅ 10 to 100 K (C is the Curie constant) over the temperature range between 1.8 and 300 K, while the metal-free radicals exhibit only weak AFM intermolecular interactions, less than the Weiss constant θ = -1 K. The magnitude of interactions observed in the metal complexes of each radical increase in order from Gd to Dy to Nd complexes. © 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim. |
| spellingShingle | Sugano, T Blundell, S Hayes, W Tajima, H Mori, H Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title | Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title_full | Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title_fullStr | Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title_full_unstemmed | Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title_short | Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes |
| title_sort | magnetism in crown ether substituted nitronyl nitroxide derivatives and their metal complexes |
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