Three cyclic lanthanide-radical complexes syntheses, crystal structures and magnetic properties
| Autor: | Yuan Yuan Gao, Peng Hu, Yan Ni Wu, Jiang Liu, Wei Ping Huang, Feng Ping Xiao |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Lanthanide
010405 organic chemistry Bridging ligand Crystal structure 010402 general chemistry Ring (chemistry) 01 natural sciences 0104 chemical sciences Ion Inorganic Chemistry chemistry.chemical_compound Crystallography Ferromagnetism chemistry Pyridine Materials Chemistry Physical and Theoretical Chemistry Single crystal |
| Zdroj: | Inorganic Chemistry Communications. 94:133-138 |
| ISSN: | 1387-7003 |
| DOI: | 10.1016/j.inoche.2018.05.030 |
| Popis: | Three lanthanide–nitronyl nitroxide radical complexes [Ln(hfac)3(NIT-2Br-4Py)]2 (Ln(III) = Gd (1), Tb (2), Dy (3); hfac = hexafluoroacetylacetonate; NIT-2Br-4Py = 2-(2′-bromo-4′-pyridyl)-(4,4,5,5-tetramethyl-3-oxylimidazoline-1-oxide)) have been synthesized. Single crystal X-ray diffraction analysis reveals that complexes 1–3 are isomorphous in which NIT-2Br-4Py acts as a bridging ligand linking two Ln(III) ions through the nitrogen atom of pyridine ring and the oxygen atom of N O group to form a four-spin system. The magnetic studies show that ferromagnetic coupling interaction between Ln(III) ions and nitronyl nitroxide radical. Moreover, ac measurements show that Tb(III) complex exhibits frequency-dependent signals at low temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect