山西大学

报告摘要：

COFs powders, as the most prevalent form in industrial applications and scientific research, require comprehensive observation of their microscopic morphology to understand material properties. Through multi-type transmission electron microscopy and in-situ XRD techniques, combined with extensive sample collection, we identified four typical structural types universally present within COFs powders and summarized their multiple crystallization pathways. These conclusions demonstrate universal applicability across COFs with different topological structures and connectivity types, while providing strong guidance for film-forming techniques and single-crystal growth of two-dimensional COFs. Notably, we discovered that water cluster diffusion induces significant lattice contraction effects in COFs. This dynamic lattice modification enables COFs with ultra-large electronic conjugation systems to exhibit highly sensitive gas-responsive characteristics, demonstrating broad application potential.

[1] J. Li et al, J. Am. Chem. Soc. 2023, 145, 26383-26392.

[2] J. Li et al, J. Am. Chem. Soc. 2025, 147, 26955-26968.

报告人简介：

Associate Professor Li Juan, who earned her Ph.D. from Fudan University's Advanced Materials Laboratory, joined Shanxi University in 2014. She later conducted academic exchanges at Professor Donglin Jiang's research group at Japan Advanced Institute of Science and Technology. In 2025, she co-founded a university-level Institute of Chemical Defense Technology with a defense industry partner, focusing on defense applications of functional porous polymers. Her current research interests center on diffusion behavior of confined metastable phases in the nanochannels and semiconductor frameworks of COFs.

会议室：M楼253会议室

邀请人：王立芬 副研究员（9963）