Lecture 1：Molecular Interplay:Fundamental and Applications

Lecture 2: Intramolecular Motion and Molecular Machinery

Speaker: Pi-Tai Chou

Time: 10:00 AM,October 22,2024

Venue: Room 502, Building of State Key Laboratory of Luminescent Materials and Devices, Wushan Campus

Abstract:

Lecture 1

I will present the molecular design and spectroscopic technique,together with the theoretical approach,to probe the molecular interactions and their applications in lighting and energy issues.The main focus will be on the revitalization of the“energy gap law”with molecular design and modification of the theoretical approaches.From both theory and experiments,we prove that the combination of exciton delocalization,deuterium isotope and low-frequency coherent motions of molecular self-assembly is able to suppress the internal reorganization energy and hence surpass the barrier imposed by energy gap law.The strategy thus makes breakthroughs on the NIR OLEDs.We also quest the single molecular NIR emission and open a new territory to pursue NIR organic emitters via intramolecular exciton delocalization.As for other type of molecular interaction,we probe the structure of the exciplex and the associated formation mechanism. 

Lecture 2

In this talk,focus will be on the photoinduced molecular motion,structural relaxation,and machinery.As for the molecular motion,prototypical patterns such as excited-state intramolecular proton transfer (ESIPT) and proton coupled electron transfer (PCET) will be demonstrated,where the correlation between kinetics and thermodynamics will be presented.The fine-tuning of ESIPT in kinetics and thermodynamics has been successfully applied in the lighting and sensing.I also would like to talk about the excited-state multiple proton transfer reaction to mimic the proton relay system in biology.Parallelly,a seminal topic on the thiol intramolecular hydrogen bond and its associated ESIPT will be presented.Finally,I will demonstrate a new type of molecular machinery.This system is based on photoinduced electron transfer or proton transfer triggering counterion motion,which serves as a facile probe for versatile applications. 

Brief introduction of reporter：

Prof.Pi-Tai Chou is world-famous by his early seminal works on the excited-state proton and proton coupled electron transfer that associate with molecular relaxations in the dielectric media.His research was then greatly expanded to a broad interdisciplinary scale,and he found ways to apply fundamental basis in inventing emerging materials for optoelectronics.He has received several international awards,including 2012 Asian and Oceanian Photochemistry Association (APA) Award (Japan), Angew.Chem.Int. Ed. AuthorProfile (2015) andTWAS (The World Academy of Science) PRIZE in Vienna, Austria (2015). Chou has published 665+ SCI papers with ～44,100+ citations and an H-index of 106.