院士大讲堂
报告题目：Exploring Intermolecular Coupling and Excited State Dynamics in Perylene Bisimide Systems: From Monomers to Dimers and Beyond
报告时间：2025-12-03 16:00
报告人： Kim Dongho 院士
Yonsei University
报告地点：卢嘉锡楼202报告厅
转播地点：翔安校区能源材料大楼3号楼会议室5，漳州校区生化主楼307教室
报告摘要：
Perylene bisimide (PBI) derivatives have gained attention for their photophysical traits and potential in various optoelectronic devices. This review explores the intermolecular associations and excited state dynamics within PBI-based systems, from monomers to assemblies, crucial for unlocking their potential. It elucidates how linkage manipulation, molecular alignment, and intermolecular associations affect photoexcited states in PBI aggregates. Starting with monomeric PBIs, the review discusses excited state dynamics within cofacially stacked PBI dimers and their intermolecular coupling effects. Long-range dipole-dipole interactions stabilize excimer states, influencing energy transfer. The review investigates mechanisms driving excimer formation and its impact on exciton migration and energy transfer within PBI aggregates. Symmetry-breaking charge transfer (SB-CT) processes in PBI dimers affect charge propagation by inducing transient absorption spectra bands, akin to photosynthetic reaction centers. The emergence of multiexciton states, crucial in singlet fission (SF), is explored, shedding light on molecular arrangement and electronic coupling's role in SF. The interplay among intermolecular interactions in PBI dimers orchestrates photoexcitation dynamics, including excimer generation, SB-CT, and multiexciton generation (MEG). Understanding these processes could lead to innovative materials for enhanced energy harvesting and sustainable energy technologies.
报告人简介：
Dongho Kim received his Ph.D. in Chemistry from the University of Washington in 1984, followed by postdoctoral research at Princeton University (1984–1985). He then served as Principal Research Scientist at the Korea Research Institute of Standards and Science (1986–2000), and in 2000 he joined the Department of Chemistry at Yonsei University, where he became Emeritus Distinguished Professor after more than two decades of influential academic leadership. Prof. Kim has directed multiple national research programs including the Creative Research Initiative Center for Ultrafast Optical Material Control and the WCU Program on Intelligent Nano-Hybrid Materials, and has chaired major international conferences in photochemistry, Raman spectroscopy, and porphyrins/phthalocyanines.
Prof. Kim is internationally recognized for his groundbreaking contributions to photophysics and photochemistry of π-conjugated molecular assemblies, ultrafast spectroscopy, exciton dynamics, and singlet fission. He has published over 650 SCI papers, including 109 in JACS and 78 in Angewandte Chemie, with over 45,000 citations and an H-index of 111. His scientific excellence has been acknowledged with numerous prestigious honors, such as the Korea Science Award (2006), the Hans Fischer Award (2020), the Porter Medal (2024), and invited lectureships worldwide, including the 2025 Solvay Conference. He is also an Elected Fellow of the Korean Academy of Science and Technology and continues to shape the field as Editor-in-Chief of IJMS (Physical Chemistry and Chemical Physics).
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