Jump to main content
Jump to site search

Issue 23, 2018
Previous Article Next Article

Pressure-induced switching properties of the iron(III) spin-transition complex [FeIII(3-OMeSalEen)2]PF6

Author affiliations


We investigated the effect of an externally applied pressure on the iron(III) Schiff-base compound [Fe(3-OMeSalEen)2]PF6 (H-3-OMeSalEen, condensation product of 3-methoxy-substituted salicylaldehyde and N-ethylethylenediamine), which at ambient pressure displays a thermal spin transition with a 3 K wide hysteresis loop centered at 164 K. Raman spectrometry revealed the occurrence of a complete spin-state switching process for a pressure of P1/2 = 8–9 kbar at room temperature. The evolution of lattice parameters as a function of pressure was followed by X-ray diffraction measurements on single crystals, highlighting the important microscopic aspects at the origin of the pressure-induced transition, i.e. an anisotropic response and a high compressibility of the HS molecular lattice. Variable temperature magnetic susceptibility measurements at different applied pressures revealed the smoothening of the spin transition curves and a linear increase of the transition temperatures by ca. 16.4 (1.0) K kbar−1, in good agreement with the Clausius–Clapeyron law. The non-negligible influence of the pressure transmitting oils on the intrinsic transition properties was also evidenced and attributed to mechanical interactions between the particles and the solidified matrix.

Graphical abstract: Pressure-induced switching properties of the iron(iii) spin-transition complex [FeIII(3-OMeSalEen)2]PF6

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Apr 2018, accepted on 15 May 2018 and first published on 15 May 2018

Article type: Paper
DOI: 10.1039/C8CP02376J
Citation: Phys. Chem. Chem. Phys., 2018,20, 15951-15959
  •   Request permissions

    Pressure-induced switching properties of the iron(III) spin-transition complex [FeIII(3-OMeSalEen)2]PF6

    J. Laisney, H. J. Shepherd, L. Rechignat, G. Molnár, E. Rivière and M.-L. Boillot, Phys. Chem. Chem. Phys., 2018, 20, 15951
    DOI: 10.1039/C8CP02376J

Search articles by author