时间: 2025年5月19日（周一）下午16:00-17:30

Time: 16:00-17:30, Monday, May 19, 2025

主持人: 西湖大学理学院PI 王鸿飞 教授

Host: Prof. Hongfei Wang, PI of School of Science, Westlake University

地址：西湖大学云谷校区E10-201报告厅

Venue: Lecture Hall, E10-201, Yungu Campus, Westlake University

讲座语言：英文

Lecture Language: English

Prof. Yunjie Xu,

Department of Chemistry, University of Alberta, Canada

email: yunjie@ualberta.ca

主讲人/Speaker:

Yunjie Xu earned her BSc in Chemistry and in Applied Mathematics from Xiamen University and a PhD in Physical Chemistry from the University of British Columbia. She is a full professor at the University of Alberta and holds the Tier I Canada Research Chair in Chirality and Chirality Recognition. Xu’s research program focuses on chirality recognition, transfer, and amplification events in isolated molecular clusters, condensed phases, and at liquid-liquid interfaces. Her pioneering contributions include quantifying stereospecific non-covalent interactions and untangling chiral events under resonance conditions, thereby advancing our understanding of chiral forces and the light-matter interactions responsible for intricate chiral phenomena. She has received numerous awards and honors, including the 2019 Gerhard Herzberg Award from Canadian Society for Analytical Sciences and Spectroscopy, the 2024 John C. Polanyi Award from Canadian Society for Chemistry, and 2024-2025 Killam Annual Professorship from the Killam Foundation. In 2018, she was elected to the Fellowship of the Royal Society of Canada, Academy of Science.

讲座摘要/Abstract:

Our research program centers on understanding mechanisms of chirality recognition, transfer, amplification at the molecular level. Two examples will be discussed in this presentation.

Built on the recent synthetic advances in ultrastable, chiral atomically precise metal clusters, we examine the vibrational circular dichroism (VCD) spectral patterns of four atomically-precise metal clusters with octahedral metal cores protected by monolayer organic ligands. While previous studies on atomically precise metal clusters have employed truncated models with fewer metal atoms and/or ligands to model chiroptical responses, we demonstrate that such approaches have critical deficiencies by using full-model VCD calculations. Furthermore, we develop a modified modes analysis to unveil the contribution of individual ligands, their collective arrangements and numbers, and the asymmetry of the metal core to the observed VCD enhancement.

The second example focuses on using interfacial tension measurements to probe chirality discrimination events at binary organic/water interfaces. Significant differences in interfacial tension are observed at a toluene/water interface containing R- or S-Tol-BINAP (2,2’-Bis(dip-tolylphosphino)-1,1’-binaphthyl) in toluene and S-serine in water. I will discuss the experimental methodology and supporting molecular dynamics simulations, which reveal stereoselective molecular interactions across the organic/water boundary.

讲座联系人/Contact:

理学院，黄莉，邮箱：huangli10@westlake.edu.cn

School of Science, Li Huang, Email: huangli10@westlake.edu.cn