报告主题：Metal-Catalyzed Carbonylative Polymerizations - A Quest for Sustainable Commodity Plastics
主讲人：JIA Li教授（阿克伦大学）
主持人：陈友根
时间：2025年7月14日周一10：00
地点：深圳大学致知楼706
嘉宾简介：
Dr. Jia is a Professor of Polymer Science and Chemistry at The University of Akron. He received his bachelor’s degree in chemistry from Lanzhou University and his Ph.D. degree from Northwestern University under the guidance of Prof. Tobin Marks. He conducted his postdoctoral research at University of California – Berkeley with Prof. Richard Andersen. He was a recipient of George Stafford Whitby Award of the ACS rubber division in 2023 and presently serves as an associate editor of Rubber Chemistry and Technology. His current research interests include transition metal-catalyzed polymerization, self-assembly in polymeric materials, and rubber chemistry and technology.
报告摘要：
Millions of tons of plastics are produced and disposed of globally each year. The plastic waste in the environment has created a plastic crisis. To make plastics more degradable in the environment and more recyclable by chemical means, functional groups must be present in the polymer backbone. Transition metal-catalyzed carbonylative polymerization (COP) is a powerful method for synthesis of a wide range of polymers with carbonyl groups in the backbone (for example, eqs 1 and 2). This presentation encompasses the studies of the Jia group on this topic in the last three decades. Rational discovery of acyl-Co(CO)4 as the catalyst for the COP of aziridines and epoxides (eq 1) will be first discussed. Subsequent design and development of zwitterionic Ni(II) complexes isoelectronic to acyl-Co(CO)4 for the COP of epoxides will be presented. With the evolution of the zwitterionic catalysts, the COPs of the two types of monomers with very different reactivities, ethylene and epoxides, eventually converge. The zwitterionic Ni(II) complexes act as dual-site catalysts for COP of ethylene together with cyclic ethers. Depending on the composition, the products range from elastomers to plastics. Finally, the most promising approach to address the practical sustainability problem of commodity plastics is perhaps simply the terpolymerization of CO, ethylene, and ana-olefin. Development of Ni catalysts to meet this practical challenge will be discussed.
