2018年7月6日上午Thomas A. P. Seery副教授講座

發布人:高級管理員 發布日期:2018-07-03

報告題目:?Total Synthesis of Nanocomposites

報告人:??Dr. Thomas A. P. Seery,美國康涅狄格大學副教授

主持人:??李偉華教授、院長

報告地點:?珠海校區海濱紅樓5棟104會議室

報告時間:?2018年7月6日10:00~11:30

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報告人簡介:

Thomas A. P. Seery

Educational?background:

Harvard University, A. B. cum laude in Chemistry, June, 1985.

University Of Southern California, Ph.D. in Chemistry, December, 1991

University Of Southern California, Postdoctoral Associate, 1992

University Of California, Berkeley Postdoctoral Associate 1993 – 1994

Appointments:

8/2000 – present Associate Professor of Chemistry and member of the Polymer Program and the Institute of Materials Science at the University of Connecticut

7/2014 – 17 Visiting Professor, Shanghai Jiao Tong University, School of Chemistry and

Chemical Engineering

6/2017, 5/2018 Visiting Professor, China Jiliang University, Hangzhou

7/2015 - 16 Visiting Professor, Shanghai Jiao Tong University, Zhiyuan College

10/2014 – 3/2015 Sabbatical at University of Freiburg, IMTEK, with Jurgen Ruehe

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報告摘要:

Metal mediated polymerizations can be initiated from particle surfaces to provide nanocomposite materials with uniquely interesting compositions. Two logical systems with end-functional coupling agents that can be chosen to provide initiating ligands for this work are thiols on gold and silanes on silica. One might expect given the wealth of literature that the major difficulties in utilizing either system for this purpose had been overcome.? Unfortunately several tools appropriate for gold nanoparticles are not effective for silica nanoparticles and vice versa. Nonetheless we have prepared well defined structures using surface initiated polymerizations from gold and silica nanoparticles where the polymerizations have been mediated by either ruthenium alkylidenes or titanium alkoxide organometallic species.

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Efforts in our laboratory have also shown that the rate of initiation is sensitive to the structure of a layer of tethered initiators when polymerizations are initiated from particle surfaces.? The results of this range from broadened molecular weight distributions to no polymerization at all.? It is also desirable to make the polymerization chemistry independent of the nature of the substrate.? Both of these issues can be addressed through manipulation of the surface coverage containing the tethered initiator.?