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Title: | A novel family of triangular CoII2LnIII and CoII2YIII clusters by the employment of Di-2-Pyridyl ketone |
Author: | Efthymiou, Constantinos G. Fhuaráin, Áine Ní Mayans Ayats, Júlia Tasiopoulos, Anastasios Perlepes, Spyros P. Papatriantafyllopoulou, Constantina |
Keywords: | Cobalt Magnetisme Clústers metàl·lics Metalls de terres rares Cobalt Magnetism Metal clusters Rare earth metals |
Issue Date: | 4-Jun-2019 |
Publisher: | MDPI |
Abstract: | The synthesis, structural characterization and magnetic study of novel CoII/4f and CoII/YIII clusters are described. In particular, the initial employment of di-2-pyridyl ketone, (py)2CO, in mixed metal Co/4f chemistry, provided access to four triangular clusters, [CoII2MIII{(py)2C(OEt)(O)}4(NO3)(H2O)]2[M(NO3)5](ClO4)2 (M = Gd, 1; Dy, 2; Tb, 3; Y, 4), where (py)2C(OEt)(O)− is the monoanion of the hemiketal form of (py)2CO. Clusters 1-4 are the first reported Co/4f (1-3) and Co/Y (4) species bearing (py)2CO or its derivatives, despite the fact that over 200 metal clusters bearing this ligand have been reported so far. Variable-temperature, solid-state dc and ac magnetic susceptibility studies were carried out on 1-4 and revealed the presence of weak ferromagnetic exchange interactions between the metal ions (JCo-Co = +1.3 and +0.40 cm−1 in 1 and 4, respectively; JCo-Gd = +0.09 cm−1 in 1). The ac susceptibility studies on 2 revealed nonzero, weak out-of-phase (χ''M) signals below ~5 K. |
Note: | Reproducció del document publicat a: https://doi.org/10.3390/magnetochemistry5020035 |
It is part of: | Magnetochemistry, 2019, vol. 5, num. 2 |
URI: | http://hdl.handle.net/2445/137298 |
Related resource: | https://doi.org/10.3390/magnetochemistry5020035 |
ISSN: | 2312-7481 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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