报告时间：2026年8月20日（星期四） 9:30至11:30

报告地点：能源基础楼201会议室

报告人：Yann Garcia，Institute of Condensed Matter and Nanosciences

UCLouvain, Belgium

                                   Email: yann.garcia@uclouvain.be                                        

Abstract

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 Recently, we developed a new generation of sensors that do not need any thermal activation,⁶ which could be used in material science and food chemistry using coordination compounds.

Recent Publications

1. (a) X. Li, N. E. I. Belmouri, M. Sy, M. Wolff, A. Rotaru, S. van Terwingen, D. Maskowicz, M. Sawczak, R. Jendrzejewski, K. Boukheddaden, Y. Garcia, J. Am. Chem. Soc. 147 (2025) 46608–46620. (b) W. Li, S. Xia, J. Liu, Y. Bi, X. Li, Y. Garcia, Coord. Chem. Rev. 566 (2026) 218195.

2. B. Wang, J. Kfoury, Z. Gong, J. Oláh, L. Zou, S. Xue, Y. Guo, Y. Garcia, J. Am. Chem. Soc. 148 (2026) 4414–4425

3. (a) V. Kumar, A. Rotaru, Y. Garcia, J. Mater. Chem. C 10 (2022) 14128 - 14134. Inside Front Cover. (b) V. Kumar, A. C. Ghosh, Y. Draoui, M. Wang, K. Van Hecke, A. Rotaru, Y. Garcia, Eur. J. Inorg. Chem. 28 (2025) e202400753.

4. X. Li, J. W. L. Wong, M. Wang, Y. Draoui, M. Wolff, K. Robeyns, A. Rotaru, Y. Garcia, CrystEngComm  28 (2026) 3449 – 3457. Front Cover.

5. M. Wang, Y. Draoui, K. Robeyns, J. Yadav, Z. Han, M. Wolff, D. Maskowicz, A. Rotaru, D. Pinkowicz, M. Sawczak, R. Jendrzejewski, Y. Garcia, Cryst. Growth Des 8 (2026) 2981-2999. Font Cover.

6. W. Li, C. Li, X. Li, M. Wang, Y. Bi, Y. Garcia, CrystEngComm 27 (2025) 6848 – 6864. Front Cover.