题 目：Luminescent lanthanide complexes: design & applications

　　报告人：Jean-Claude G. B nzli

　　单 位：EPFL Lausanne (Switzerland) & The Hong Kong Polytechnic University

　　时 间：2023/11/24 10:00

　　地 点：厦门稀土中心1号楼101会议室

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　　附简介：J.-C. B nzli was educated as a physico-chemical inorganic chemist (BSc and PhD at EPFL; postdocs at UBC, Canada and ETH Z rich. He started to work on lanthanide coordination chemistry in 1975 at University of Lausanne and was promoted full professor in 1980. In 2001 he transferred to EPFL. World Class University professor at Korea University in 2009-2013, he has since been working at the Chinese Academy of Sciences, UTS (Sydney), HKBU (Hong Kong), SUSTech (Shenzhen), and starting in October 2023 at Hong Kong Polytechnic University. He has been dean of the Faculty of Sciences and Vice-president of the University of Lausanne and as such implemented the Erasmus program of European student exchange in Switzerland. In parallel he kept interest in the relationship between luminescence and structure, developing several luminescent materials, including ionic liquids, liquid crystals, and nanoparticles. All this led to the design of rugged bioprobes for the detection of markers expressed by cancerous cells, a project he is still pursuing with extension to combining diagnosis with therapy. He is the founder (1989) and president of the European Rare Earth and Actinide Society and the senior editor of the Handbook on the Physics and Chemistry of Rare Earths. He has published 339 WOS papers (31 550 cites, 93 cites/paper, h index = 84).

　　报告摘要：During the past decades, lanthanides have reached a privileged status in high technology, becoming indispensable additives to a wealth of functional materials. In particular, the un-matched luminescent properties of lanthanide ions are crucial to the development of lasers, phosphors for screens and economical lighting, optical fibers for telecommunications, security inks and counterfeiting tags, bio-analyses and bioimaging, nanothermometers, light-converting devices. It took time to understand the origin of the faint but sharp emission lines of the lanthanides but progressively, scientists and engineers have learned how to tune them and to turn them into fascinating applications.

　　The first part of the lecture deals with the development of highly luminescent complexes and materials and explains the strategies adopted to enhance light emission thanks to the antenna effect, and to avoid non-radiative de-activations. The second part is concerned with quantitatively evaluating the performances of lanthanide complexes, namely quantum yield and sensitization efficiency. In the last part of the lecture, some recent examples of applications to biology and medicine as well as to light conversion in solar cells will be summarized, including comparison with inorganic nanoparticles.