Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide
Radical ion salts of the neutral organic radicals, 2-imidazolyl nitronyl nitroxide (2-IMNN) and 2-benz-imidazolyl nitronyl nitroxide (2-BIMNN), and a diradical cation salt of pyridine-2,6-diylbis(nitronyl nitroxide) (2,6-PYBNN), were prepared. The radical ion salts of 2-BIMNN, Li+(2-BIMNN)(.-) and (...
| Auteurs principaux: | , , , |
|---|---|
| Format: | Conference item |
| Publié: |
2004
|
| _version_ | 1826266305018200064 |
|---|---|
| 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 | Radical ion salts of the neutral organic radicals, 2-imidazolyl nitronyl nitroxide (2-IMNN) and 2-benz-imidazolyl nitronyl nitroxide (2-BIMNN), and a diradical cation salt of pyridine-2,6-diylbis(nitronyl nitroxide) (2,6-PYBNN), were prepared. The radical ion salts of 2-BIMNN, Li+(2-BIMNN)(.-) and (2-BIMNN).-BF4-, exhibit strong antiferromagnetic interactions with exchange coupling constants J/k = -42 K and -510 K, respectively, while the 2-IMNN salts show Curie-Weiss behaviour with Weiss constants theta = -9.0 K for Li+(2-IMNN)(.-) and theta = -1.8 K for (2-IMNN)Cl-.-(-), indicating weak interactions. The diradical cation salt (2,6-PYBNN)Cl-..+(-) 14 shows intramolecular ferromagnetic interaction with J/k = +4.7 K and intermolecular antiferromagnetic interaction with theta = -0.7 K, which is remarkably reduced from J/k = -57 K observed in the diradical 2,6-PYBNN. |
| first_indexed | 2024-03-06T20:36:52Z |
| format | Conference item |
| id | oxford-uuid:32eff6b3-2371-4381-adb6-e1757b1fd130 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:36:52Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:32eff6b3-2371-4381-adb6-e1757b1fd1302022-03-26T13:17:07ZMagnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxideConference itemhttp://purl.org/coar/resource_type/c_5794uuid:32eff6b3-2371-4381-adb6-e1757b1fd130Symplectic Elements at Oxford2004Sugano, TBlundell, SHayes, WDay, PRadical ion salts of the neutral organic radicals, 2-imidazolyl nitronyl nitroxide (2-IMNN) and 2-benz-imidazolyl nitronyl nitroxide (2-BIMNN), and a diradical cation salt of pyridine-2,6-diylbis(nitronyl nitroxide) (2,6-PYBNN), were prepared. The radical ion salts of 2-BIMNN, Li+(2-BIMNN)(.-) and (2-BIMNN).-BF4-, exhibit strong antiferromagnetic interactions with exchange coupling constants J/k = -42 K and -510 K, respectively, while the 2-IMNN salts show Curie-Weiss behaviour with Weiss constants theta = -9.0 K for Li+(2-IMNN)(.-) and theta = -1.8 K for (2-IMNN)Cl-.-(-), indicating weak interactions. The diradical cation salt (2,6-PYBNN)Cl-..+(-) 14 shows intramolecular ferromagnetic interaction with J/k = +4.7 K and intermolecular antiferromagnetic interaction with theta = -0.7 K, which is remarkably reduced from J/k = -57 K observed in the diradical 2,6-PYBNN. |
| spellingShingle | Sugano, T Blundell, S Hayes, W Day, P Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title | Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title_full | Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title_fullStr | Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title_full_unstemmed | Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title_short | Magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| title_sort | magnetism in organic radical ion salts based on imidazolyl and benzimidazolyl nitronyl nitroxide |
| work_keys_str_mv | AT suganot magnetisminorganicradicalionsaltsbasedonimidazolylandbenzimidazolylnitronylnitroxide AT blundells magnetisminorganicradicalionsaltsbasedonimidazolylandbenzimidazolylnitronylnitroxide AT hayesw magnetisminorganicradicalionsaltsbasedonimidazolylandbenzimidazolylnitronylnitroxide AT dayp magnetisminorganicradicalionsaltsbasedonimidazolylandbenzimidazolylnitronylnitroxide |