Structure and Magnetism of Seven-Coordinate Fe-III, Fe-II, Co-II and Ni-II Complexes Containing a Heptadentate 15-Membered Pyridine-Based Macrocyclic Ligand

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73591061" target="_blank" >RIV/61989592:15310/18:73591061 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/ejic.201800769" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/ejic.201800769</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/ejic.201800769" target="_blank" >10.1002/ejic.201800769</a>

Result language
angličtina
Original language name
Structure and Magnetism of Seven-Coordinate Fe-III, Fe-II, Co-II and Ni-II Complexes Containing a Heptadentate 15-Membered Pyridine-Based Macrocyclic Ligand
Original language description
A heptadentate macrocyclic ligand, H2L (3,12,18-triaza-6,9-dioxabicyclo[12.3.1]octadeca-1,14,16-triene-3,12-diacetic acid) with two acetate pendant arms, and its complexes [(FeL)-L-III]ClO4 (1), [(FeL)-L-II]H2O (2), [(CoL)-L-II]H2O (3), and [(NiL)-L-II]H2O (4) were synthesized. The complexes possess an axially compressed pentagonal bipyramidal geometry with the coordination numbers of 7 for 2 and 3, and 6 + 1 for 4. The magnetic susceptibility measurements revealed magnetic anisotropy for compounds 1-4 expressed by axial zero-field splitting (ZFS) parameters (D = -1.3 cm(-1) for 1, -9.6 cm(-1) for 2, 29.1 cm(-1) for 3, and -8.5 cm(-1) for 4), with a rhombic ZFS (E/D = 0, 0.006, 0, and 0.193, respectively). Field-induced slow relaxation of magnetization was observed for the Co-II complex 3 only. The structural and magnetic features of 1-4 were compared with those of similar complexes containing ligand with two 2-pyridylmethyl pendant arms. Magnetic features of the complexes were also evaluated using theoretical calculations (DFT, CASSCF/NEVPT2).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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