Cyano-Bridged Dy(III) and Ho(III) Complexes with Square-Wave Structure of the Chains

Four new cyano-bridged DyIII-CrIII, DyIII-FeIII, HoIII-CrIII and HoIII-FeIII bimetallic coordination polymers were synthesized by the reaction of [Ln(H2dapsc)(H2O)4](NO3)3 (Ln = Dy, Ho); H2dapsc = 2,6-diacetylpyridinebis(semicarbazone)) with K3[M(CN)6] (M = Cr, Fe) in H2O, resulting in the substitut...

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Bibliographic Details
Published in:Inorganics 2022-04, Vol.10 (4), p.41
Main Authors: Sasnovskaya, Valentina D., Zorina, Leokadiya V., Simonov, Sergey V., Talantsev, Artem D., Yagubskii, Eduard B.
Format: Article
Language:English
Subjects:
Anisotropy
Bimetals
Chemical synthesis
Chromium
Coordination polymers
crystal structure
dc and ac magnetic properties
field-induced single-molecular magnets
Geometry
H2dapsc ligand
Hydrogen bonds
Iron
Ligands
Ln(III) complexes
Magnetic induction
Magnetic measurement
Magnetic relaxation
Magnets
Metals
nine-coordinate complexes
Substitution reactions
Water chemistry
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Summary:Four new cyano-bridged DyIII-CrIII, DyIII-FeIII, HoIII-CrIII and HoIII-FeIII bimetallic coordination polymers were synthesized by the reaction of [Ln(H2dapsc)(H2O)4](NO3)3 (Ln = Dy, Ho); H2dapsc = 2,6-diacetylpyridinebis(semicarbazone)) with K3[M(CN)6] (M = Cr, Fe) in H2O, resulting in the substitution of two water molecules in the coordination sphere of rare earth by paramagnetic tricharged hexacyanides of Fe and Cr. The complexes are isostructural and consist of alternating [Ln(H2dapsc)(H2O)2]3+ and [M(CN)6]3− units linked by bridges of two cis-cyano ligands of the anion to form square-wave chains. The ac magnetic measurements revealed that the DyCr and DyFe complexes are field-induced single molecule magnets, while their Ho analogs do not exhibit slow magnetic relaxation.
ISSN:2304-6740
2304-6740
DOI:10.3390/inorganics10040041