Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.327
Publication date: 18th December 2023
Spin-crossover (SCO) complexes are promising building blocks for spintronic and high-density memory devices as they can be reversibly switched between two distinct spin states, low-spin (LS) and high-spin (HS) using a variety of external inputs (i.e. temperature, light, pressure, etc…). Additionally, the spin transition goes with change in other properties like volume, conductivity, or color. One step forward, chiral SCO compounds have been proposed as active components of magneto-optical devices.[1 Interestingly, when electrons are injected through chiral molecules, one electronic spin is preferably transmitted, working as spin filters at room temperature. This fascinating outcome is called Chiral Induced Spin Selectivity (CISS) effect.[2] Few years ago, we observed a CISS enhancement when adding paramagnetic centers in chiral self-assembled monolayers (SAMs).[3] Now, we want to push the field further by taking benefit from SCO bistability to modulate the magnitude of CISS effect. In this scenario, we pursue using chiral SCO compounds self-assembled on surfaces to further elucidate the role of the metallic center in the CISS performance. To reach this final goal, we have synthetized chiral SCO complexes and prepared self-assembled monolayers (SAMs) by a solution approach (preliminary step to have enhanced CISS effect). Specifically, in this project we have prepared chiral SCO complexes with tetradentate chiral Schiff base ligands (L) of formula [Fe(L)(NCX)2] (X = S, Se).
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