Spin state photo-switching of Fe(II) Complexes
(2026) ICMES 2026 - 9th edition of the International Conference on Materials & Environmental Science — Location: Saïdia (11.June.2026)
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- Spin crossover (SCO) coordination complexes have attracted great interest during the last thirty years, after their potential use in display devices and electronic computing was proposed. While the SCO phenomenon of these materials can be induced thermally, 1 the possibility to address their spin state by light-irradiation was demonstrated. 2 The so-called Light Induced Excited Spin State Trapping (LIESST) has however shown poorly applicability both in term of ignition temperature and relaxation behaviors. Chemists have therefore developed alternative strategies where an activated complex component can indirectly induce a spin state modification. This refers to the Ligand-Driven Light Induced Spin Change (LD-LISC), the Guest Driven Light Induced Spin Change (GD-LISC), and the recently discovered Anion Driven Light Induced Spin Change (AD-LISC). 3 A photo-responsive non-coordinated anion was inserted in the crystal lattice of a Fe(II) SCO complex, i.e. at a remote location compared to the metallic center, responsible of the spin switching effect. Light induced structural changes occurring in the non-coordinated anion are then expected to induce a spin state change at the metal center. 3 Crystal engineering of Fe(II) SCO complexes is thus needed to secure an effective propagation of long-range effects induced by the anion within the crystal lattice. 4,5
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Garcia, Y. (2026, June 12). Spin state photo-switching of Fe(II) Complexes. ICMES 2026 - 9th edition of the International Conference on Materials & Environmental Science, Saïdia. https://doi.org/10.1021/acs.cgd.5c01701)