| Autor: |
Min Ren, Song-Song Bao, Bin Liu, Ze-Hua Zheng, Zhong-Li Xu, Ting-Ting Wang, Zhong-Sheng Cai, Li-Min Zheng |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Dalton transactions (Cambridge, England : 2003). 44(9) |
| ISSN: |
1477-9234 |
| Popis: |
Three new chain compounds in which the Mn2(salen)2 dimers are bridged by O-P-O units are reported, namely, [Mn2(salen)2(C6H9PO3H)](ClO4) (1), [Mn2(salen)2(C6H5PO3H)](ClO4) (2) and [Mn2(salen)2(C6H5PHO2)](ClO4) (3). The phosphonate or phosphinate ligands adopt a syn-anti bidentate bridging mode in 1, while a syn-syn bidentate bridging mode in 2 and 3, thus leading to a difference in the Mn-O···O-Mn torsion angle over the O-P-O bridge. Compound 1 shows a paramagnetic behavior with dominant antiferromagnetic interactions. In compounds 2 and 3, the antiferromagnetic interactions through the O-P-O bridges are considerably stronger than those in 1. They display coexistence of single chain magnet (SCM) behaviour with a spin canted structure and metamagnetism at low temperature. The results demonstrate that the magnetic dynamics of the O-P-O bridged Mn2(salen)2 chains may be modulated by selecting suitable phosphonate or phosphinate ligands. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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