【光讲预告】超快辐射化学:液态水和生物分子体系离化的电子-核超快动力学- 大数跨境

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【光讲预告】超快辐射化学:液态水和生物分子体系离化的电子-核超快动力学

两江科技评论

2023-03-10

导读：光讲—有用光学报告在线开讲活动主办方中国科学院西安光学精密机械研究所承办方*中科院西安光机所青促会小组&析光

光讲—有用

光学报告在线开讲活动

主办方

中国科学院西安光学精密机械研究所

承办方

*中科院西安光机所青促会小组&析光学术

*两江科技评论

*light学术出版中心

《Ultrafast Science》&《光子学报》编辑部

光学报告在线开讲活动

直播主题

Ultrafast Radiation Chemistry: Electron and Nuclear Dynamics of Ionized Liquid Water and Biomolecules

直播时长

45分钟讲解+15分钟答疑

开播时间

3月14日(周二) 晚间19: 00

第三季“光讲”线上报告-第三讲

报告人简介

Zhi-Heng Loh

Zhi-Heng Loh is Associate Professor in the School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), Singapore. He received his S.B. from M.I.T. and Ph.D. from University of California, Berkeley. After postdoctoral research at UC Berkeley, he returned to Singapore in 2010 to start his independent career at NTU. His primary research interest lies in the study of ultrafast ionization-induced phenomena in gases, liquid water, and aqueous solutions, probed using femtosecond X-ray to infrared spectroscopies. His awards include the Nanyang Assistant Professorship, the Asian and Oceanian Photochemistry Association Prize for Young Scientists, and the Chemical Society of Japan Distinguished Lectureship Award in Physical Chemistry. He is passionate about undergraduate teaching and currently serves as Associate Dean (Academic) of the College of Science, NTU.

报告摘要

The ionization of liquid water serves as the principal trigger for a myriad of phenomena that are relevant to radiation chemistry and radiation biology. The earliest events that follow the ionization of water, however, remain relatively unknown. In this talk, I will introduce some of the recent results from my group on the investigation of ionized liquid water using ultrafast spectroscopy. These experiments employ femtosecond pulses spanning the short-wave infrared (~2 mm) to the soft X-ray (~2 nm), and reveal the ultrafast dynamics of hydrated electron precursors and the elusive H₂O·⁺ radical cation. These studies of ionized liquid water have also been extended to biomolecules in aqueous solution, revealing ultrafast structural rearrangement dynamics induced by electron ejection from these molecules. Our results shed light on the elementary ultrafast dynamics that accompany the interaction of ionizing radiation with molecules of biological relevance.

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