Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 3, Issue 23, Pages 3431-3434Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz3011805
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- DFG [Sfb 658]
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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)(2)L] (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 T-1/2 = 235(6) K and a transition width of Delta T-80 = 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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