Chemistry and Materials Science Seminar: Fluorescent probes for single molecule catalysis and chemical sensing
Chemistry and Materials Science Seminar
Fluorescent probes for single molecule catalysis and chemical sensing
Dr. Xiangcheng Sun
Assistant Professor
Dept. of Chemical Engineering, RIT
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Abstract:
Fluorescent materials have been widely used in sensing, imaging and catalysis areas. In this talk, I will present synthesis of small fluorescent monomers with different emission colors, and polymerization of synthesized monomers at both ensemble and single-molecule level. We have achieved real-time optical sequencing of single synthetic polymer chains under living polymerization conditions. Multi-color imaging of polymer growth by single catalysts at single-monomer resolution has been realized through CREATS (coupled reaction approach toward super-resolution-imaging). In another project, I will show the use of green fluorescent carbon dots (CDs) for efficient detection of Ferrous ions. We have found the green fluorescence of carbon dots could be sensitively and selectively quenched by ferrous ions. We propose aggregation induced quenching is responsible for the fluorescence quenching, and the sensing mechanism is verified.
Speaker 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 chemical sensing and single-molecule catalysis. As a new faculty, he recently received American Chemical Society Petroleum Research Fund for supporting the single-molecule catalysis work.
Intended Audience:
Undergraduates, graduates, experts. Those with interest in the topic.
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