关于举行香港大学杜莉莉 博士学术报告的通知

2019-11-25 284

报告题目:The application of the time-resolved spectroscopy methods in the mechanism study of the materials

报  告  人:杜莉莉 博士(香港大学)

邀  请  人:王志明 研究员

报告时间:2019年11月26日(周二)上午10:00

报告地点:北区科技园1号楼发光材料与器件国家重点实验室502会议室


Abstract

The time-resolved spectroscopy techniques are considered to be powerful tools for studying and characterizing the mechanisms of materials. Here, we report the use of transient absorption and time-resolved resonance Raman to study a number of TPE-based derivatives with varying structural rigidity and AIE properties. This allowed an examination of the direct correlation between the state-dependent coupling motions and inhibited fluorescence. Our new results prove the existence of photocyclized intermediates in several systems. In addition, femtosecond transient absorption spectroscopy (fs-TA) was also employed to demonstrate that the excited state aromaticity inversion for the non-aromatic annulene derivative of cyclooctatetraene causes the typical AIE phenomenon for this system in spite of its rotor-free structure. Therefore, results from the study of the photophysical and photochemical mechanisms of AIEgens will be instructive to guide the tailoring and further development of more efficient luminogens in the future. Besides, we also demonstrated that the fs-TA was able to observe the photo-induced proton transfter process between the metallopolymer and the carbon nanotubes and study the details of the electron fow process, which constructs new and efficient light harvesting systems by choosing an appropriate pair of sensitizer/electron acceptors.


Personal  profile

Dr. Du achieved her Phd degree in the University of Hong Kong, whose supervisor is Chair Prof. David Lee Phillips. She focused on designing the precursors of the reactive intermediate and studying photo-induces reaction mechanisms, such as nitrenium ions and oxenium ions. Later, Dr. Du works as a postdoc fellow in Prof. Phillips group. She extends her research area into the mechanism study of the photophysical process of the AIE materials and polymers by employing the time-resolved spectroscopy methods. She has published 32 papers as first author, corresponding author and co-author, including J. Am. Chem, SciNat. Commun.,  J. Phys. Chem. LettJ. Mater. Chem. A. and Chem. Sci.


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