Abstract:
Ever since the elucidation of molecular phosphorescence as the radiative decay of the triplet excited state by G. N. Lewis and M. Kasha, the field has received sustained interests. In recent years, growing popularity has been noted for room-temperature phosphorescent (RTP) materials based on purely organic molecules, due to their potential applications such as biocompatible imaging/sensing agents and highly efficient flexible light-emitting diodes. In this seminar, we briefly review the history of molecular phosphorescence and important breakthroughs, and then focus on the strategies we use in our laboratory for designing/developing new types of molecular RTP materials, mainly including: 1) charge-transfer mediation; 2) sp3-atom bridged donor-acceptor pairs; 3) aggregation/polymerization enhanced intersystem crossing, assisted and backed by theoretical calculations. Finally, we demonstrate a handful of prospective applications based on these molecular RTP materials and predict how they can be further improved.
Biography:
Prof. Guoqing Zhang is a Professor of Chemistry in the Bio-X Interdisciplinary Division at the Hefei National Laboratory for Physical Sciences at the Microscale, an affiliation at the University of Science and Technology of China (USTC). Prof. Zhang received his B.S. degree from USTC in Polymer Science and Engineering in 2005 and his Ph.D. degree from the Department of Chemistry at the University of Virginia in 2010. He worked with Prof. X. Sunney Xie at Harvard Chemistry and Chemical Biology from 2010 to 2011. Prof. Zhang moved back to USTC as a professor in 2011 and has worked there ever since. In 2014, Prof. Zhang took an adjunct faculty position at Virginia Tech and started teaching General Chemistry (CHEM1036) for the Summer Sessions; In 2015, Prof. Zhang started Anhui Kiwi Biotechnology Co. Ltd. which provides hygiene solutions for hospitals and medical institutions in China, and has since created jobs for more than 40 families; in 2016, Prof. Zhang bought a house in Denver, CO for the pursuit of his personal interests in luminescent rocks and minerals at the Colorado School of Mines in his spare time.
Bi-Weekly Seminar Series by the NYU-ECNU Center for Computational Chemistry at NYU Shanghai