Single-Chain Magnets Based on Octacyanotungstate with the Highest Energy Barriers for Cyanide Compounds
By introducing large counter cations as the spacer, two isolated 3, 3-ladder compounds, (Ph(4)P)[Co(II)(3-Mepy)(2.7)(H(2)O)(0.3)W(V)(CN)(8)]·0.6H(2)O (1) and (Ph(4)As)[Co(II)(3-Mepy)(3)W(V)(CN)(8)] (2, 3-Mepy = 3-methylpyridine), were synthesized and characterized. Static and dynamic magnetic charac...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4829875/ https://www.ncbi.nlm.nih.gov/pubmed/27071451 http://dx.doi.org/10.1038/srep24372 |
Sumario: | By introducing large counter cations as the spacer, two isolated 3, 3-ladder compounds, (Ph(4)P)[Co(II)(3-Mepy)(2.7)(H(2)O)(0.3)W(V)(CN)(8)]·0.6H(2)O (1) and (Ph(4)As)[Co(II)(3-Mepy)(3)W(V)(CN)(8)] (2, 3-Mepy = 3-methylpyridine), were synthesized and characterized. Static and dynamic magnetic characterizations reveal that compounds 1 and 2 both behave as the single-chain magnets (SCMs) with very high energy barriers: 252(9) K for 1 and 224(7) K for 2, respectively. These two compounds display the highest relaxation barriers for cyano-bridged SCMs and are preceded only by two cobalt(II)-radical compounds among all SCMs. Meanwhile, a large coercive field of 26.2 kOe (1) and 22.6 kOe (2) were observed at 1.8 K. |
---|