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Very Anisotropic 2D Molecular Magnetic Materials Based on Pentagonal Bipyramidal Heptacyanidorhenate(IV)

Moreno Pineda, Eufemio; Wernsdorfer, Wolfgang 1; Vostrikova, Kira E.
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)

Abstract:

The first neutral 2D heterometallic assemblies based on orbitally degenerate heptacyanidorhenate(IV) were prepared and structurally characterized. An analysis of the magnetic data for the polycrystalline samples of Ph$_4$P[{Mn(acacen)}$_2$Re(CN)$_7$]·Solv (1) and PPN[{Mn(acacen)}$_2$Re(CN)$_7$]·Solv (2) have shown that both materials display slow magnetic relaxation at temperatures below 10 and 21 K for 1 and 2, respectively. Despite the presence of the same molecular magnetic modules that make up the anionic layers, the studied 2D networks differ significantly in magnetic anisotropy, having a small coercive field (0.115 T) for 1 and a large one (~2.5 T) for 2 at 2 K. In addition, for both polymers a M(H) value does not saturate at the maximum available field of 7 T, and the material 2 is a metamagnet. This intriguing difference originates from the cooperative anisotropic spin interaction in Re$^{IV}$−CN−Mn$^{III}$ pairs and the zero field splitting (ZFS) effect of Mn$^{III}$ ions with a noncollinear alignment of the local magnetic axes in crystals of the compounds.


Verlagsausgabe §
DOI: 10.5445/IR/1000154027
Veröffentlicht am 05.01.2023
Originalveröffentlichung
DOI: 10.3390/ma15238324
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.12.2022
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000154027
Erschienen in Materials
Verlag MDPI
Band 15
Heft 23
Seiten Art.-Nr.: 8324
Vorab online veröffentlicht am 23.11.2022
Schlagwörter 2D coordination polymers, cyanide-bridged heterometallic assemblies, heptacyanorhenate(IV), manganese(III) Schiff base complexes, orbitally degenerate 5d complex, pentagonal bipyramidal cyanidometallate
Nachgewiesen in Scopus
Dimensions
Web of Science
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