Magnetism in organic diradical ion salts based on nitronyl nitroxide
Magnetism in organic diradical ion salts prepared from the diradicals, pyridine-2,6-diylbis(nitronyl nitroxide) [(2,6-PYBNN)(center dot center dot)] and phenol-2,4-diylbis(nitronyl nitroxide) [(2,4-POBNN)(center dot center dot)], were investigated by using SQUID magnetometers. The diradical cation s...
| Main Authors: | , , , |
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| Format: | Conference item |
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2005
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| _version_ | 1797064287016976384 |
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| author | Sugano, T Blundell, S Hayes, W Day, P |
| author_facet | Sugano, T Blundell, S Hayes, W Day, P |
| author_sort | Sugano, T |
| collection | OXFORD |
| description | Magnetism in organic diradical ion salts prepared from the diradicals, pyridine-2,6-diylbis(nitronyl nitroxide) [(2,6-PYBNN)(center dot center dot)] and phenol-2,4-diylbis(nitronyl nitroxide) [(2,4-POBNN)(center dot center dot)], were investigated by using SQUID magnetometers. The diradical cation salt (2,6-PYBNN)Cl--+(-) shows intramolecular ferromagnetic (FM) interaction with the exchange coupling constant J/k = +9.0 K and intermolecular antiferromagnetic (AFM) interaction with the Weiss constant theta = -0.75 K in the low temperature phase below 4.5 K. Although the intramolecular FM interaction is close to that observed in the neutral diradical 2,6-PYBNN.., the intermolecular AFM interaction is significantly reduced from J'/k = -57 K due probably to the increase of intermolecular distances by the incorporation of Cl- ions into the salt. We also present and discuss the magnetic behavior in the diradical cation salt (2,6-PYBNN)center dot center dot+BF4- and the diradical anion salt. (C4H9)(4)N+(2,4-POBNN)(center dot center dot-). (c) 2005 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T21:12:06Z |
| format | Conference item |
| id | oxford-uuid:3e87ec35-8f16-41f4-8266-d672d3f924db |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:12:06Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:3e87ec35-8f16-41f4-8266-d672d3f924db2022-03-26T14:26:00ZMagnetism in organic diradical ion salts based on nitronyl nitroxideConference itemhttp://purl.org/coar/resource_type/c_5794uuid:3e87ec35-8f16-41f4-8266-d672d3f924dbSymplectic Elements at Oxford2005Sugano, TBlundell, SHayes, WDay, PMagnetism in organic diradical ion salts prepared from the diradicals, pyridine-2,6-diylbis(nitronyl nitroxide) [(2,6-PYBNN)(center dot center dot)] and phenol-2,4-diylbis(nitronyl nitroxide) [(2,4-POBNN)(center dot center dot)], were investigated by using SQUID magnetometers. The diradical cation salt (2,6-PYBNN)Cl--+(-) shows intramolecular ferromagnetic (FM) interaction with the exchange coupling constant J/k = +9.0 K and intermolecular antiferromagnetic (AFM) interaction with the Weiss constant theta = -0.75 K in the low temperature phase below 4.5 K. Although the intramolecular FM interaction is close to that observed in the neutral diradical 2,6-PYBNN.., the intermolecular AFM interaction is significantly reduced from J'/k = -57 K due probably to the increase of intermolecular distances by the incorporation of Cl- ions into the salt. We also present and discuss the magnetic behavior in the diradical cation salt (2,6-PYBNN)center dot center dot+BF4- and the diradical anion salt. (C4H9)(4)N+(2,4-POBNN)(center dot center dot-). (c) 2005 Elsevier Ltd. All rights reserved. |
| spellingShingle | Sugano, T Blundell, S Hayes, W Day, P Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title | Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title_full | Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title_fullStr | Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title_full_unstemmed | Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title_short | Magnetism in organic diradical ion salts based on nitronyl nitroxide |
| title_sort | magnetism in organic diradical ion salts based on nitronyl nitroxide |
| work_keys_str_mv | AT suganot magnetisminorganicdiradicalionsaltsbasedonnitronylnitroxide AT blundells magnetisminorganicdiradicalionsaltsbasedonnitronylnitroxide AT hayesw magnetisminorganicdiradicalionsaltsbasedonnitronylnitroxide AT dayp magnetisminorganicdiradicalionsaltsbasedonnitronylnitroxide |