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Chemical Engineering Seminar

Dr. Xiangcheng Sun

Assistant Professor

Rochester Institute of Technology

Abstract

Fluorescent materials have been widely used in sensing, imaging and catalysis areas. In the first project, I will present how we utilized fluorogenic probes for single-molecule fluorescence imaging of synthetic polymers and cross-coupling reactions. A coupled reaction approach toward super-resolution-imaging (CREATS) with a fluorogenic uncaging reaction will be briefly introduced to visualize the polymerization with single monomer resolution, and to sequence copolymers in real time. In addition, via designing a fluorogenic coupling reaction, the single- molecule fluorescence imaging is used to characterize the cross coupling reaction with Pd nanocatalysts, to visualize the reactions occurred at the nanoparticle surfaces, supporting the heterogeneous reaction pathways for the coupling reactions with Pd nanocatalysts. The facet effect on the catalytic activities of Tsuji-Trost reactions was identified via a single-molecule approach. In the second project, fluorogenic probes and multi-emissive carbon nanoparticles were developed in our lab for the detection, identification and differentiation of multiple metal ions simultaneously. Through strategies of fluorogenic reactions, multi-dimensional sensing, on-off-on strategy, and advanced data analysis, the sensitive and selective detection of metal ions and differentiation of multiple metal ions were achieved.

Bio

Dr. Xiangcheng Sun has been an Assistant Professor in the Department of Chemical Engineering at the Rochester Institute of Technology (RIT) since fall of 2021. He is also the program faculty of School of Chemistry and Materials Science and Department of Microsystems Engineering at RIT. Prior to RIT, he conducted his postdoctoral research at Cornell University and University of California, Santa Barbara, and obtained his Ph.D. degree in Chemical Engineering at University of Connecticut. His current research interests include design and preparation of novel fluorescent probes for imaging, catalysis and sensing. Until now, he has received multiple honors and awards due to his work such as American Chemical Society Petroleum Research Fund New Doctoral Investigator, Scialog Fellow in Sustainable Metals, Minerals and Materials, Rising Stars in Analytical Chemistry at the ACS conference, New Principal Investigator at Materials Advances, and Stanford/Elsevier’s Top 2% researcher list in Analytical Chemistry for 2023-2024.