主讲嘉宾：高志钊 教授 (Prof. Vincent Chi-Chiu KO)

主持人：舒桐 副教授

时间：2025年1月13日 周一 下午15: 00-16: 00

地点：深圳大学丽湖校区A2-517(2)

嘉宾简介：

Prof. Vincent Ko earned his B.Sc. (1999) and Ph.D. (2003) from the University of Hong Kong, where his doctoral research focused on metal-containing photochromic compounds and luminescent organometallic materials. Following the completion of his Ph.D., he continued his academic journey as a Postdoctoral Fellow under the mentorship of Prof. Vivian Yam. In 2006, Prof. Ko joined City University of Hong Kong as an Assistant Professor. He was promoted to Associate Professor in 2012 and subsequently to Professor in 2023. His research interests lie in the design and synthesis of stimuli-responsive and photofunctional materials. These include luminescent materials, sensors, photoswitching and photochromic materials, mechanoresponsive materials, photocatalysts, and other smart materials.

报告简介：

The advancements in luminescent transition metal complexes highlight their tremendous potential in diverse applications, including photocatalysis, optoelectronics, and stimuli-responsive smart materials. We have developed and investigated a diverse array of luminescent transition metal complexes with applications in photocatalysis, photosensitization, chemosensing, biological labeling, and smart materials. In particular, Re(I) diimine complexes and their derivatives, including isocyanide- and carbene-containing Re(I) diimine complexes, have been designed and synthesized to exhibit readily tunable photophysical properties. By strategically modifying isocyanide and carbene ligands, precise control over the metal-to-ligand charge transfer (MLCT) excited states have been achieved, resulting in enhanced phosphorescent properties such as improved quantum yields, blue-shifted emissions, extended excited-state lifetimes, and modulated electrochemical potentials. Detailed vibrational and ultrafast laser spectroscopic studies provided critical insights into their electronic transitions and excited-state dynamics.

Building on these findings, charge-neutral phosphorescent materials have been developed for the practical applications in electroluminescent devices. Furthermore, similar photophysical tuning strategies were applied to other luminophores, producing complexes capable of efficiently harvesting visible light to drive photocatalytic reactions, including CO₂ reduction, amidation, esterification, cross-coupling, and alcohol oxidation.