Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Christoph Krüger
  • Peter Augustín
  • Ivan Nemec
  • Zdeňek Trávníček
  • Hiroki Oshio
  • Roman Boča
  • Franz Renz
  • Zdeňek Trávníček

Research Organisations

External Research Organisations

  • Slovak University of Technology in Bratislava
  • Palacky University
  • University of Tsukuba
  • University of SS Cyril and Methodius, Trnava
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Details

Original languageEnglish
Pages (from-to)902-915
Number of pages14
JournalEuropean Journal of Inorganic Chemistry
Issue number5-6
Early online date4 Dec 2012
Publication statusPublished - Feb 2013

Abstract

Iron(III) mononuclear complexes that involve pentadentate Schiff base ligands and chlorido, azido, cyanido, cyanato, thiocyanato, or selenocyanato coligands were synthesized, structurally characterized, and subjected to a magnetochemical investigation. The Schiff bases were derived either from 5-chlorosalicylaldehyde or the 2-hydroxyacetonaphthone analogues by using an asymmetric 1,6-diamino-4-azahexane. A polymorphism that originated from different pentadentate ligand conformations on the iron center or different arrangements of noncovalent contacts was detected for the thiocyan ato complexes. The central iron(III) atoms are mostly in the high-spin states, except for that with the coordinated cyanido ligand. Four complexes that contain the thiocyanato or selenocyanato ligand exhibit spin crossover, centered at the critical temperature (Tc) of 42, 114, 282, and 293 K, respectively. The magnetic data of all compounds were analyzed using the spin Hamiltonian formalism including the zerofield splitting (ZFS) term, and in the case of the spin-crossover compounds, the Ising-like model with vibrations was applied.

Keywords

    Iron, Ligand design, Pseudohalides, Schiff bases, Spin crossover

ASJC Scopus subject areas

Cite this

Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands. / Krüger, Christoph; Augustín, Peter; Nemec, Ivan et al.
In: European Journal of Inorganic Chemistry, No. 5-6, 02.2013, p. 902-915.

Research output: Contribution to journalArticleResearchpeer review

Krüger, C, Augustín, P, Nemec, I, Trávníček, Z, Oshio, H, Boča, R, Renz, F & Trávníček, Z 2013, 'Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands', European Journal of Inorganic Chemistry, no. 5-6, pp. 902-915. https://doi.org/10.1002/ejic.201201038
Krüger, C., Augustín, P., Nemec, I., Trávníček, Z., Oshio, H., Boča, R., Renz, F., & Trávníček, Z. (2013). Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands. European Journal of Inorganic Chemistry, (5-6), 902-915. https://doi.org/10.1002/ejic.201201038
Krüger C, Augustín P, Nemec I, Trávníček Z, Oshio H, Boča R et al. Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands. European Journal of Inorganic Chemistry. 2013 Feb;(5-6):902-915. Epub 2012 Dec 4. doi: 10.1002/ejic.201201038
Krüger, Christoph ; Augustín, Peter ; Nemec, Ivan et al. / Spin Crossover in Iron(III) Complexes with Pentadentate Schiff Base Ligands and Pseudohalido Coligands. In: European Journal of Inorganic Chemistry. 2013 ; No. 5-6. pp. 902-915.
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AU - Nemec, Ivan

AU - Trávníček, Zdeňek

AU - Oshio, Hiroki

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AU - Renz, Franz

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