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A Novel Family of Triangular CoII2LnIII and CoII2YIII Clusters by the Employment of Di-2-Pyridyl Ketone

1
SSPC, Synthesis and Solid State Pharmaceutical Centre, School of Chemistry, National University of Ireland Galway, University Road, H91 TK33 Galway, Ireland
2
Departament de Quimica Inorgànica i Orgànica, Secció Inorgànica and Institut de Nanociencia I, Nanotecnologia (IN2UB), Universitat de Barcelona, Marti i Franquès 1-11, 08028 Barcelona, Spain
3
Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus
4
Department of Chemistry, University of Patras, 26504 Patras, Greece
*
Author to whom correspondence should be addressed.
This paper is dedicated to Professor Masahiro Yamashita, a leading and inspiring Scientist on Molecular Magnetism, on the occasion of his 65th birthday.
Magnetochemistry 2019, 5(2), 35; https://doi.org/10.3390/magnetochemistry5020035
Received: 31 March 2019 / Revised: 22 May 2019 / Accepted: 24 May 2019 / Published: 4 June 2019
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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 14 are the first reported Co/4f (13) 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 14 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. View Full-Text
Keywords: 3d/4f metal clusters; di-2 pyridyl ketone; magnetism; cobalt; lanthanides; mixed metal Co/Ln clusters 3d/4f metal clusters; di-2 pyridyl ketone; magnetism; cobalt; lanthanides; mixed metal Co/Ln clusters
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Efthymiou, C.G.; Ní Fhuaráin, Á.; Mayans, J.; Tasiopoulos, A.; Perlepes, S.P.; Papatriantafyllopoulou, C. A Novel Family of Triangular CoII2LnIII and CoII2YIII Clusters by the Employment of Di-2-Pyridyl Ketone. Magnetochemistry 2019, 5, 35.

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