Regensburg 2022 – scientific programme
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DS: Fachverband Dünne Schichten
DS 20: Poster
DS 20.2: Poster
Wednesday, September 7, 2022, 16:00–18:00, P3
X-ray characterization of an above-RT bi-stable sublimable molecular spin-crossover Fe(II)-complex — •Yahya Shubbak1, Miguel Gavara Edo2, Arno Ehresmann1, and Eugenio Coronado Miralles2 — 1Institute of Physics & Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, D-34132 Kassel — 2Institute of Molecular Science (ICMol), University of València, S-46980 Paterna
Spin crossover (SCO) molecules are a promising type of material that can undergo reversible switching between low-spin (LS)- and high-spin (HS)-states upon external stimuli (heat, light, pressure, etc.)[1], making them useful for information technology, data storage and optoelectronics[2]. However, most SCO molecules need to be cooled significantly for this transition to be observable. We have investigated the hitherto unknown electronic structure of the complex molecule bis[hydrotris(1,2,4-triazol-1-yl)borate]iron(II) ([Fe(HB(tz)3)2])[3] capable of above-RT transition by XPS and XAS measurements, since the distinct electronic structure in both spin-states unmistakably prove the transition between them.
[1]P. Gütlich and H. A. Goodwin. "Spin Crossover in Transition Metal Compounds I." Springer Berlin Heidelberg, May 2004. 356 pp. [2]E. P. Geest et al.,"Contactless Spin Switch Sensing by Chemo*Electric Gating of graphene". In: Advanced Materials (2020), p. 1903575. [3]S. Rat et al.,"Solvatomorphism and structural-spin crossover property relationship in bis[hydrotris(1,2,4-triazol-1-yl)borate]iron(ii)". In: CrystEngComm 19.24 (2017).