Heteronuclear Iron(III)-Schiff Base Complexes with the Hexacyanidocobaltate(III) Anion: On the Quest To Understand the Governing Factors of Spin Crossover.

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ID: 94022
2020
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Abstract
Two heteronuclear compounds ( and ) containing three ferric centers linked in facial-like mode with the magnetically silent hexacyanidocobaltate(III) anion were prepared and studied. The structural investigation revealed that both compounds are tetranuclear complexes with molecular formulas of [{Fe(L1)NC}Co(CN)]·2CHOH·2.5CHCN () and [{Fe(L2)NC}Co(CN)]·2HO·1CHOH (). The magnetic properties of both complexes are controlled by the molecular design of the corresponding pentadentate Schiff base anions L1 and L2. While compound with a symmetric ligand prepared from salicylaldehyde shows high-spin state properties, compound containing the asymmetric ligand with naphthalene units either is low-spin in its solvated form or shows a gradual but hysteretic spin crossover event when desolvated. The magnetic behavior was analyzed with respect to the Ising-like model and spin Hamiltonian, respectively, and the results were confronted with calculations. Additionally, the influence of structural features, lattice solvent molecules, the distribution of electronic terms, and active orbitals on the spin state properties of reported complexes is discussed.
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pavlik2020heteronuclearinorganic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Pavlik, Ján;Masárová, Petra;Nemec, Ivan;Fuhr, Olaf;Ruben, Mario;Šalitroš, Ivan;
Journal Inorganic chemistry
Year 2020
DOI
10.1021/acs.inorgchem.9b03097
URL
Keywords
battery Supercapacitor energy density, power density hybrid ion capacitor

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