Spin Crossover in a Vacuum-Deposited
Submonolayer
of a Molecular Iron(II) Complex
Posted on 2015-12-16 - 22:08
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 [FeII(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.
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Bernien, Matthias; Wiedemann, Dennis; Hermanns, Christian F.; Krüger, Alex; Rolf, Daniela; Kroener, Wolfgang; et al. (2015). Spin Crossover in a Vacuum-Deposited
Submonolayer
of a Molecular Iron(II) Complex. ACS Publications. Collection. https://doi.org/10.1021/jz3011805