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Chemical Papers

, Volume 72, Issue 4, pp 821–828 | Cite as

Computational design of magnetically active trinuclear heterometallic complexes on the basis of 1,3,5-triazapentadiene ligands

  • Alyona A. Starikova
Original Paper
  • 103 Downloads

Abstract

A series of trinuclear mixed-ligand complexes of iron(II) 2,6-di(pyrazol-1-yl)pyridine moieties with linkers on the basis of 1,3,5-triazapentadiene transition metal (M = Co, Ni, Cu, Zn) bischelates has computationally been designed using the density functional theory TPSSh/6-311++G(d,p) calculations. The systems possessing complete (M = Co, Ni) and partial (M = Cu, Zn) two-step spin-crossover phenomenon at ferrous ions have been revealed. Two spin-state switching mechanisms determining by spin-crossover at iron centers and configurational isomerism at cobalt ion may simultaneously occur in solution of corresponding heterometallic compound (M = Co). The nature of the exchange interactions between paramagnetic metal centers is controlled by variation of a metal in bischelate linker (M = Co, Ni, Cu, Zn). Energy and magnetic characteristics of electromeric forms of the complexes with nickel and copper central metal ions (M = Co, Ni) allow to consider them as promising candidates for the design of molecular switches.

Keywords

Iron complexes Magnetic properties Spin-crossover Bischelate linker 1,3,5-triazapentadiene ligands DFT calculations 

Notes

Acknowledgements

This work has been supported by Russian Foundation for Basic Research (Grant No. 16-33-60019 mol_a_dk).

Supplementary material

11696_2017_195_MOESM1_ESM.doc (4.3 mb)
Electronic Supplementary Material associated with this article (details of the DFT calculations, including optimized geometries and energy parameters of the complexes I (Co, Ni, Cu, Zn) and III (Co, Ni, Cu, Zn)), and also the shape of natural magnetic orbital of the electromer 12 HSFeII-Cu-HSFeII can be found in the online version of this paper (DOI:  10.1007/s11696-017-0195-7). (DOC 4410 kb)

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2017

Authors and Affiliations

  1. 1.Institute of Physical and Organic Chemistry at Southern Federal UniversityRostov-on-DonRussian Federation

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