康奈尔大学助理教授林松博士受邀来访biwn必赢做学术报告。报告主题为“Toward the Rational Design of Catalysts for Organic Synthesis and Energy Catalysis”，时间为5月30日（周一）下午15:00，欢迎各位感兴趣的课题组老师和同学前往听取报告。
题 目: Toward the Rational Design of Catalysts for Organic Synthesis and Energy Catalysis
讲座人: 林松 博士
康奈尔大学
时 间: 2016年5月30日（周一）下午15:00-16:30
地 点:卢嘉锡202报告厅
欢迎学院师生积极参加!
嘉宾简介：
林松博士，本科毕业于北京大学（导师：施章杰教授），后在哈佛大学获得博士学位（导师：Prof. Eric Jacobsen），随后于加州大学伯克利分校从事博士后研究（合作导师：Prof. Chris Chang），现加盟康奈尔大学（课题组主页http://songlin.chem.cornell.edu）。他的研究兴趣主要集中于电化学合成、不对称催化和有机材料化学，致力于发展跨学科的方法解决有机合成化学和可持续化学中未解决的难题。
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报告摘要：
Toward the Rational Design of Catalysts for Organic Synthesis and Energy Catalysis
The importance of catalysts in modern science can hardly be overstated. The rational design of tailored molecules and materials as efficient and robust catalysts is a central goal in both organic and inorganic chemistry. Here, two different approaches to catalyst development are presented for asymmetric organic synthesis and energy catalysis, respectively.
The first part outlines the mechanism-based design and optimization of organocatalysts for enantioselective organic transformations. A class of thioureaspossessing extended aromatic substituents has been demonstrated to bea privileged catalyst scaffold for a wide variety of transformations proceeding through ion-pair intermediates.Through detailed mechanistic analysis,the catalystshave been shown to directrate acceleration and enantioinductionvia transition-state stabilization using a series of attractive, noncovalent interactions. Particularly, anion-binding and cation–π stabilization act in synergy to recognize and stabilize theion-pair transition states of the key bond-forming and -breaking processes. The mechanistic study has led to a new solution to a traditionally challenging synthetic problem—highly enantioselective selenocyclizations.
The second part presentsaninterdisciplinary molecular-materials approach to the development of robust, efficient and selective electrocatalysts for CO2 reduction.In this approach, homogenous small-molecule catalysts are integrated withstable, porous and tunable covalent organic frameworks (COFs). The resulting new materialpromotes CO2 reduction to CO in neutral aqueous buffer with high turnover frequency and excellent Faradic efficiency. This COF also exhibits long-term stability and high selectivity for CO production over competing H2 evolution.The structural tunability of COFs has allowedthe optimization of the catalytic activity by employing frameworks with extended pore sizes to enhancesurface area and substrate diffusion. We have also investigated the in situ preparation of oriented thin-film COFs on a carbon electrode support to further enhance the catalytic performance and provide a system more amenable to practical applications.
