Detail publikace

Effect of Coordination Geometry on Magnetic Properties in a Series of Cobalt(II) Complexes and Structural Transformation in Mother Liquor

Ghosh, S. Kamilya, S. Das, M. Mehta, S. Boulon, ME. Nemec, I. Rouzieres, M. Herchel, R. Mondal, A.

Originální název

Effect of Coordination Geometry on Magnetic Properties in a Series of Cobalt(II) Complexes and Structural Transformation in Mother Liquor

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The three Co(II) complexes [Co(bbp)(2)][Co(NCS)(4)]center dot 4DMF (1), [Co(bbp)(NCS)2(DMF)]center dot 2DMF (2), and [Co(bbp)(NCS)(2)] (3) have been synthesized and characterized by single-crystal X-ray diffraction, magnetic, and various spectroscopic techniques. Complexes 1 and 3 are obtained by the reaction of Co(NCS) 2 with 2,6-bis(1H-benzo[d]imidazol-2-yl)pyridine (bbp), and complex 1 undergoes a structural transformation to form complex 2. A single-crystal X-ray study revealed that complex 1 is comprised of two Co(II) centers, a cationic octahedral Co(II) unit and an anionic tetrahedral Co(II) unit, while the Co(II) ion is in a distorted-octahedral environment in 2. Moreover, in complex 3, the Co(II) ion is in a distorted-square-pyramidal geometry. The effect of coordination geometry on the magnetic properties was studied by both static and dynamic magnetic measurements. Direct current (dc) magnetic susceptibility measurements showed that all of the Co(II) ions are in high-spin state in these complexes. Alternating current (ac) magnetic susceptibility measurements indicated that complexes 2 and 3 display slow relaxation of magnetization in an external dc magnetic field, while complex 1 displayed no such property. EPR experiments and theoretical calculations were consistent with the above findings.

Klíčová slova

SINGLE-ION MAGNET; BASIS-SETS; SPIN-CROSSOVER; DONOR LIGANDS; ANISOTROPY; RELAXATION; FIELD; VALENCE; CYANIDE; ATOMS

Autoři

Ghosh, S.; Kamilya, S.; Das, M.; Mehta, S.; Boulon, ME.; Nemec, I.; Rouzieres, M.; Herchel, R.; Mondal, A.

Vydáno

18. 5. 2020

Nakladatel

AMER CHEMICAL SOC

Místo

WASHINGTON

ISSN

1520-510X

Periodikum

Inorganic Chemistry

Ročník

59

Číslo

10

Stát

Spojené státy americké

Strany od

7067

Strany do

7081

Strany počet

15

URL

https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.0c00538

BibTex

@article{BUT165532,
  author="Ghosh, S. and Kamilya, S. and Das, M. and Mehta, S. and Boulon, ME. and Nemec, I. and Rouzieres, M. and Herchel, R. and Mondal, A.",
  title="Effect of Coordination Geometry on Magnetic Properties in a Series of Cobalt(II) Complexes and Structural Transformation in Mother Liquor",
  journal="Inorganic Chemistry",
  year="2020",
  volume="59",
  number="10",
  pages="7067--7081",
  doi="10.1021/acs.inorgchem.0c00538",
  issn="1520-510X",
  url="https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.0c00538"
}