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Bernien M, Wiedemann D, Hermanns CF, et al. Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex. J Phys Chem Lett. 2012;3(23):3431-4doi: 10.1021/jz3011805.
Bernien, M., Wiedemann, D., Hermanns, C. F., Krüger, A., Rolf, D., Kroener, W., Müller, P., Grohmann, A., & Kuch, W. (2012). Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex. The journal of physical chemistry letters, 3(23), 3431-4. https://doi.org/10.1021/jz3011805
Bernien, Matthias, et al. "Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex." The journal of physical chemistry letters vol. 3,23 (2012): 3431-4. doi: https://doi.org/10.1021/jz3011805
Bernien M, Wiedemann D, Hermanns CF, Krüger A, Rolf D, Kroener W, Müller P, Grohmann A, Kuch W. Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex. J Phys Chem Lett. 2012 Dec 06;3(23):3431-4. doi: 10.1021/jz3011805. Epub 2012 Nov 09. PMID: 26290968.
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J Phys Chem Lett. 2012 Dec 06;3(23):3431-4. doi: 10.1021/jz3011805. Epub 2012 Nov 09.

Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex.

The journal of physical chemistry letters

Matthias Bernien, Dennis Wiedemann, Christian F Hermanns, Alex Krüger, Daniela Rolf, Wolfgang Kroener, Paul Müller, Andreas Grohmann, Wolfgang Kuch

Affiliations

  1. †Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
  2. ‡Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany.
  3. §Department of Physics, Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, 91058 Erlangen, Germany.

PMID: 26290968 DOI: 10.1021/jz3011805

Abstract

Spin-state switching of transition-metal complexes (spin crossover) is sensitive to a variety of tiny perturbations. It is often found to be suppressed for molecules directly adsorbed on solid surfaces. We present X-ray absorption spectroscopy measurements of a submonolayer of [Fe(II)(NCS)2L] (L: 1-{6-[1,1-di(pyridin-2-yl)ethyl]-pyridin-2-yl}-N,N-dimethylmethanamine) deposited on a highly oriented pyrolytic graphite substrate in ultrahigh vacuum. These molecules undergo a thermally induced, fully reversible, gradual spin crossover with a transition temperature of T1/2 = 235(6) K and a transition width of ΔT80 = 115(8) K. Our results show that by using a carbon-based substrate the spin-crossover behavior can be preserved even for molecules that are in direct contact with a solid surface.

Keywords: N4 ligands; X-ray absorption spectroscopy; iron(II); magnetic molecules; monolayer; spin crossover; surfaces

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