1.報告會簡介
報告人：Mercouri Kanatzidis（教授）
時 間：2017年6月5日（星期一） 上午09：00（開始時間）
地 點： 友誼校區東會議室
主 題： Design and Prediction of New Chalcogenides
內容簡介： An ultimate goal in the field of chemistry is to identify and promote foundational and rational approaches needed to turn synthesis art into science by combining the exquisite predictability of organic synthesis with the high yields of solid state chemistry. The search for new inorganic materials and efficient syntheses is therefore a fundamental goal of chemistry. In contrast to solid-state methods, inorganic syntheses in liquid fluxes permit bond formation, framework assembly and crystallization at lower temperatures due to facile diffusion and chemical reactions with and within the flux itself. The liquid fluxes are bona-fide solvents similar to conventional organic or aqueous solvents. These reactions can produce a wide range of materials, often metastable, from oxides to intermetallics, but typically the formation mechanisms are poorly understood. In this talk I will describe how we design, approach, perform, observe, understand, and engineer the formation of compounds from inorganic melts. I will focus on how novel chalcogenides can form using the fluxes but also design concepts such as the“counterion effect”, “dimensional reduction” and “panoramic synthesis”. For example in systems such asK-Cu- S and K-Sn- S compounds that span metallic and insulating behavior can be isolated. Common structural motifs within these materials systems belie structural precursors in the melt that may be controlled by tuning reaction conditions and composition. Using complementary techniques of in-situ x-ray diffraction we can create time-dependent maps of reaction space and probe the mobile species present in melts. An important link in our chemistry is the concept of a ‘functional group,’ a fragment of a few atoms that behaves predictably when combined with other functional groups or reagents. When well defined building blocks are present and stable in the reaction, prospects for increased structural diversity and product control increase substantially. The stabilization of a particular building block is accomplished with the tuning of flux composition which controls Lewis basicity and redox potential. In such tunable and dynamic fluxes, synthesis can be directed towards new materials. I will highlight routes toward the ultimate goal of targeted materials synthesis by controlling inorganic melt chemistry.
2.歡迎各學院師生前來聽報告。報告會期間請關閉手機或將手機調至靜音模式。
黨委研究生工作部
材料學院
2017年6月2日
報告人簡介
Mercouri Kanatzidis教授，于1979年在塞薩洛尼基亞里士多德大學獲得化學學士學位，1985年在愛荷華大學獲得化學博士學位，并于1985-1987年期間分別在美國密歇根大學和西北大學進行博士后研究工作。2006年擔任西北大學Charles E. and Emma H. Morrison主席教授職務，2010年成為MRS會士，2012年成為AAAS會士，2016年成為APS會士。2003-2016年間，獲得包含Alexander von Humboldt Prize，International Thermoelectric Society Outstanding Achievement Award，Royal Chemical Society DeGennes Prize，American Physical Society 2016 James C. McGroddy Prize等在內的各類獎項十余項。
他目前主要從事材料的設計、合成及其方法論、深層表征技術等內容，致力于具備特殊化學、物理或電學性能的可替代物質的潛在應用研究。主要研究領域包含特殊材料物理性能研究、環境修復、太陽能及廢熱能量轉化等。累計發表學術論文1000余篇，其中Nature及Science 正刊發表論文20余篇，引用次數5萬余次，h指數>100。Mercouri Kanatzidis教授目前擔任Journal of Solid State Chemistry雜志主編，是Chemistry of Materials，Journal of Alloys and Compounds，Bulletin Korean Chemical Society，Energy and Environmental Science，Journal of Materials Chemistry A等雜志的編委會成員。同時也是Journal of American Chemical Society, Physical Review B., Physical Review Letters, Chemistry of Materials, Nature, Nature Materials, Nature Chemistry, Nature Communications, Nature Energy, Science, ACS Nano 等國際著名期刊的特邀審稿人。
