題目：Nonplanar aromatic molecules at surfaces: self-assembly, spin filtering and molecular motors
報告人：Prof. Dr. Karl-Heinz Ernst（Empa, Swiss Federal Laboratories for Materials Science and Technology, Switzerland） 
時  間：2017年7月10日(周一)上午10:00
地  點：北京理工大學 中心教學樓610

Abstract:
 Molecular recognition among chiral molecules on surfaces is of paramount importance in biomineralization, enantioselective heterogeneous catalysis, and for the separation of chiral molecules into their two mirror-image isomers (enantiomers) via crystallization or chromatography. Understanding the principles of molecular recognition in general, however, is a difficult task and calls for investigation of appropriate model systems. One popular approach is thereby studying intermolecular interactions on well-defined solid surfaces, which allows in particular the use of scanning tunneling microscopy (STM). Examples of chiral amplification via the so-called ‘sergeant-and-soldiers’ effect as well as manipulation of chiral adsorbates via inelastic electron tunneling will be presented. In a Pasteur-type experiment at the nanoscale, molecules that constitute a dimer are spatially separated with a molecular STM tip and their absolute handedness is determined with submolecular resolution STM. Moreover, we report spin-dependent filtering of electrons by monolayers of these helical molecules. Finally the first successful electrical current- driven, unidirectional motion of a synthetic molecule will be presented. 
 

簡歷：
Karl-Heinz Ernst，瑞士聯邦材料科學與技術實驗室高級科學家，蘇黎世大學教授。1990年德國柏林自由大學獲博士學位，1992年加入瑞士聯邦材料科學與技術實驗室。曾為美國華盛頓大學、德國柏林自由大學、美國IBM實驗室（Almaden?）訪問學者。 長期從事有機功能分子在固體表面的自組裝結構和物性調控研究，在手性識別和分離、有機納米機器等方面取得了一系列創造性成果，其有機納米馬達相關成果曾被2016年諾貝爾化學獎評審委員會在公布獲獎人名單時提及。在Nature、Nature chemistry、PRL、JACS、Angew. Chem.、NanoLett.等期刊發表論文130多篇，他引3500多次，h-index為35。在國際學術會議上作邀請報告200多次。先后擔任CHIMIA ?、Surface Science ?、Helvetica Chimica Acta 等學術期刊編委，并曾多次組織和主持國際學術會議。
 

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