SKM 2023 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 4: Thin Film Properties I
DS 4.6: Vortrag
Montag, 27. März 2023, 16:45–17:00, SCH A 316
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 Mirales2 — 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).