Presenter: Prof. Klaus Müllen
Max Planck Institute for Polymer Research, Germany
Topic: A Polymer Chemistry ofGraphenes and Graphene Nanoribbons
Time: 10:00 AM, Oct.26th (Wednesday)
Location: ConferenceRoom B, BLDG 909-1F
Abstract
Carbon materials are of immensepractical importance, but are often known as structurally ill-defined “blackstuff” such as soot. Graphenes and graphene nanoribbons (GNRs), theirgeometrically restricted cutouts, are new additions to the carbon family whichare widely praised as multifunctional wonder materials and rich playgrounds forphysicists. Indeed, graphenes hold enormous promise as materials for energytechnologies. Further, GNRs are regarded as a new generation of semiconductorssuperior to i) silicon in view of the required miniaturization of printedcircuits and superior to ii) classical conjugated polymers due to better bandstructure control. Above all, however, graphene as a two-dimensional polymerand GNRs are true challenges for materials synthesis.
Herein, we approach graphenefabrication in two steps. “Top-down” protocols such as electrochemicalexfoliation are applied for batteries, fuel cells and photodetectors. In the“bottom-up” synthesis of GNRs, repetitive cycloaddition reactions in solutionare shown to afford multiply branched polyphenylene polymers which then serveas precursors for perfectly “graphitized”, solution-processable GNRs as long as600 nm. An alternative on-surface synthesis utilizes immobilization of suitablemonomers and in-situ STM-control of the polymerization to secure structural perfection.
It is thus a synthetic breakthrough which leads to new materials science and physics such as single-molecule field effect transistors from GNRs and even spintronics. The present fundamental study is far away from robust technologies, but an attempt can be made at predicting some future trends.
Biography
Klaus Müllen was director at theMax Planck Institute for Polymer Research. Since the beginning of 2016, heholds an emeritus position for continuation of his research there and is fellowof the Gutenberg Research College of Mainz University. His broad researchinterests range from the development of new polymer-forming reactions, to thechemistry and physics of single molecules as well as graphenes, dendrimers andbiosynthetic hybrids. He published about 1700 papers.His papers have more than79,000 citations with an H-index of 125. He received many awards such as theMax Planck Forschungspreis, the Philip Morris Forschungspreis, the Nozoe-Award,the Science Award of the “Stifterverband”, the Innovation Award of the State ofNorth Rhine Westphalia, the Nikolaus August Otto Award, Society of PolymerScience Japan International Award, ACS Award in Polymer Chemistry, Tsungming TuAward, Taiwan, BASF-Award for Organic Electronics, Franco-German Award of theSociéte Chimique de France, Adolf-von-Baeyer-Medal, GDCh, Utz-Hellmuth-FelchtAward, SGL Group, China Nano Award, the Carl Friedrich Gauß-Medal, van’t Hoff Awardof the Royal Netherlands Academy of Sciences and the Hermann-Staudinger Award.From 2008-2009 he served as president of the German Chemical Society (GDCh).2013-2014 he was president of the German Association for the Advancement ofScience and Medicine. He is member of the American Academy of Arts &Sciences, the North-Rhine-Westphalian Academy for Sciences and Art, theNational Academy Leopoldina, the European Academy of Sciences (EURASC), and theBraunschweigische Wissenschaftliche Gesellschaft. In 2010 he received anAdvanced ERC Grant for his work on nanographenes. He is associate editor of theJournal of the American Chemical Society.
Contact: Prof. Lifeng Chi
（责任编辑：张伶 邮箱：zhangling10@suda.edu.cn）
