报告题目: “Greener” synthesis of -conjugated semiconducting polymers: From 1D linear narrow bandgap polymers to 2D/3D conjugated networks
π-Conjugated molecules and polymers have emerged as key materials for next generation of printable flexible electronic devices such as sensors, light-emitting diodes, field-effect transistors and solar cells. Most of the -conjugated molecules and polymers have been synthesized through conventional coupling methods such as Suzuki coupling and Stille coupling, both of which involve the tedious C-H activation using organometallic reagents that suffer from their high flammability, high toxicity and poor stability.
In this talk, I will present our recent efforts towards synthesis of a variety of narrow bandgap small molecules and polymers under the scheme of C-H direct arylation as a new atomically efficient and ecologically green method. I will discuss how the rational selection of monomers and catalytic systems enable the facile synthesis of -conjugated molecules and polymers with tunable structures and optoelectronic properties in fewer steps, and without need of C-H bond preactivation and without involvement of stannyl toxic reagents.
Mingfeng Wang is currently a Nanyang Assistant Professor in the School of Chemical and Biomedical Engineering at Nanyang Technological University, Singapore. He received his B.Sc. degree in Chemistry at Jilin University in 2001, followed by his M.Sc. degree in Polymer Chemistry and Physics under the supervision of Prof. Xi Zhang. In 2004, he joined Prof. Mitchell A. Winnik’s group at the University of Toronto and obtained his Ph.D. degree in Polymer Chemistry and Materials in 2009. Then he was awarded with a Postdoctoral Fellowship supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), and moved to Prof. Fred Wudl’s group at the University of California, Santa Barbara. He joined the School of Chemical and Biomedical Engineering at Nanyang Technological University in 2012. His current research focuses on polymeric materials with bioinspired structures and advanced functions for optoelectronic and biomedical applications.