Guest Seminar - Chiral Mesostructured Inorganic Materials with CISS-based Various Chiral Anisotropy
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Various inorganic materials with multi-chiral hierarchical mesostructures (Au,1,2 Ag,3 Cu,4 Carbon, SiO2, TiO2, CuO, ZnO, SnO2, BiOBr, NiO, Fe3O4, Fe2O3, In2O3, CdSe@CdS, ZnS5, hydroxyapatite), ranging from the atomic to micrometer scale were synthesized by cooperative self-assembly of chiral templates, such as, amino acid derived amphiphiles, DNA and peptides, small chiral molecules, and inorganic sources. These materials exhibited chiral induced spin selectivity (CISS)-based various chiral anisotropy (ChA), such as photo-ChA (i.e. OAs including reflection-, absorption-, and emission-based OAs), Surface-Enhanced Raman Scattering-ChA,1 Photomagnetic-ChA,2 Resistance-ChA, cell regulation-ChA, electrocatalytic-ChA3 and photocatalytic-ChA4 etc. The multi-OAs with remarkably prominent selectivity are due to the additional selective light-harvesting that occurs the reflection-based OA overlaps with the absorption- and emission-based OA and CISS-based OA. The other ChAs were speculated to arise from CISS effects due to the opposite effective magnetic fields induced by electron motion in the antipodal helical structure. Surface-Enhanced Raman Scattering-ChA1 and Photomagnetic-ChA2 were applied in enantiomeric quantification with loading of enantiomers on chiral mesostructured Au films.
Recently, it has been discovered the chirality induced spin polarization of chiral nanostructured Ag films can promote the formation of triplet OCCO by regulating its parallel electron spin alignment, and the helical lattice distortion of nanostructures can decrease reaction energy of *OCCO, which trigger C-C coupling and promote subsequent *OCCO hydrogenation to facilitate the generation of C2+ products.3 Chiral structured Cu has been utilized to achieve asymmetric electrocatalytic reduction of carbon dioxide to synthesize various amino acids, mainly serine.4 Chiral mesostructured ZnS have been utilized to achieve asymmetric photocatalytic reduction of carbon dioxide to synthesize various amino acids, mainly serine.5 The directional spin control in inorganic helical nanostructures could provide new strategies in quantum technology and theories in photo-electro-magneto-physics.
References
[1] Liu, Z.; Ai, J.; Bai, T.; Fang, Y.; Ding, K.; Duan, Y.; Han, L.; Che, S. Chem., 2022, 8, 186-196.
[2] Liu, Z., Ai, J.; Kumar, P.; You, E.; Zhou, X.; Liu, X.; Tian, Z.; Bouř, P.; Duan, Y.; Kotov, N. A.; Ding, S.; Han, Lu.; Che, S. Angew. Chem. Int. Ed., 2020, 59, 15226.
[3] Zhang, W.; Ai, J.; Ouyang, T.; Lu, Y.; Liu, A.; Han, L .; Duan, Y.; Tian, C.; Chu, C.; Ma, Y.; Che, S.; Fang, Y. J. Am. Chem. Soc., 2024, 28214–28221.
[4] Fang, Y.; Liu, X.; Liu, Z.; Han, L.; Ai, J.; Zhao, G.; Terasaki, O.; Cui, C.; Yang, J.; Liu, C.; Zhou, Z.; Chen, L.; Che, S. Chem., 2023, 9, 460-471.
[5] Cui, Y.; Ai, J.; Han, L.; Duan, Y.; Liu, J.; Liu, X.; Chen, L.; Jia, M.; Chen, J.; Chu, C.; Ma, Y.; Ouyang, T.; Che, S.; Fang, Y. Chem, 11(2025), 102390.
Prof. Shunai Che received her PhD from Yokohama National University, Japan, working on the synthesis of mesoporous materials under Prof. Tatsumi Takashi. She worked as a postdoctor for Sumio Iijima’s carbon-project and a JSPS fellow. In 2004, Shunai Che has moved back to China and been appointed as a professor of Department of Chemistry, School of Chemistry and Chemical Technology, Shanghai Jiao Tong University. She (1) discovered the anionic surfactant templating route to synthesize mesoporous silica; (2) found a new fabrication route for chiral mesostructured inorganic materials and their unique properties, including various chiral anisotropy, enantiomeric discrimination and asymmetric catalysis. Che’s research target is the development of new type mesostructured inorganic materials and their applications in catalyst, separation and optical devices.