Gusev, A. N., Shulgin, V. F., Riush, I. O., Lyssenko, K. A., Eremenko, I. L., & Linert, W. (2017). A new family of Co(II), Ni(II), Fe(II) triple helicate systems on 5,5′-di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole) basis: Synthesis, structure and magnetic studies. Inorganica Chimica Acta, 456, 136–141. https://doi.org/10.1016/j.ica.2016.10.040
E163-01-2 - Forschungsgruppe Koordinationschemie und bio-anorganische Chemie
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Journal:
Inorganica Chimica Acta
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ISSN:
0020-1693
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Date (published):
Feb-2017
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Number of Pages:
6
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Publisher:
ELSEVIER SCIENCE SA
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Peer reviewed:
Yes
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Keywords:
Inorganic Chemistry; Physical and Theoretical Chemistry; Materials Chemistry; Dinuclear triple helicate; Triazole; Magnetic studies
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Abstract:
Reaction of 5,5′-bi(pyridin-2-yl)-3,3′-bi(1,2,4-triazole) (H2L) with Ni(II), Co(II) and Fe(II) nitrates generates three novel dinuclear triple helicate complexes. Obtained compounds fully characterized by elemental analysis, UV-Vis and IR-spectroscopy. Moreover, the triple-helical structure of was con-firmed by X-ray in solid state and by ESMS-studies in solution. Complexation behavior was studied by UV-Vis spectrophotometric titration experiments that revealed the formation of species with 2:3 metal - ligand molar ratio. The magnetic properties of the Ni(II), Co(II) and Fe(II) are dominated by weak antiferromagnetic interactions (altogether with spin-orbital coupling in the Co(II) case). The magnetic studies of air and vacuum dried Iron complex samples indicate that lattice water molecules directly affect the magnetic behavior of these complexes.