12月7日生物质分子工程中心学术报告
文章来源: 点击数: 更新日期:2018-11-23
报告题目Proton Transfer Polymerization质子转移聚合
  Anzar Khan Professor @ Korea University
报告时间2018127日(周五)上午10:00
报告地点:生物科技楼441报告厅
主办单位:生物质分子工程中心;林学与园林学院
报告人简介:Anzar Khan carried out his doctoral studies at the Free University Berlin (Germany). He then joined Prof. Craig Hawker's lab at the University of California at Santa Barbara (USA) as a post-doctoral scholar. He then moved to ETH-Zurich as a group leader. Since 2015, Anzar is with the Department of Biological and Chemical Engineering at Korea University as an assistant professor. Here, he is leading a research group with interests in the arena of polymer synthesis.
报告内容:While an old reaction, the interest in thiol-epoxy reaction, especially as a polymerization process, is only recent. The power of this chemistry lies in its efficiency, operation under ambient conditions, commercial availability of a vast variety of thiol and epoxide carrying molecules that can be utilized as monomers, a long list of polymerization catalysts and associated solvent systems, and formation of a hydroxyl group upon completion. The amine-epoxy reaction bears similar hallmarks but is relatively simpler as a catalyst is not required for this process. Moreover, in comparing with the thiol-epoxy system that may sometimes give rise to disulfide defects through oxidative dimerization of thiols, the amine-epoxy system is comparatively more robust and insensitive to such a side reaction. The polymers resulting from thiol-epoxy and amine-epoxy reactions are termed as poly(ß-hydroxythio-ether)s and poly(ß-hydroxyl amine)s, respectively. The polymerization process itself is referred to as ‘proton transfer polymerization’. This is because quenching of the alkoxide anion, generated upon the nucleophilic attack of thiolate or amine moiety on the epoxide unit, through protonation is the critical step that ultimately decides the nature of propagation and the final structure of the polymer. It is understood that multiple proton-donors can exist within a polymerization system. Our attempt in this presentation would be to document the growing interest in the aforementioned chemistries as the polymerization process.
 
报告题目Synthesis and Properties of Corannulene Derivatives环戊烷衍生物的合成及性质研究
  Mihaiela C. Stuparu Assistant Professor @ Nanyang Technological University
报告时间2018127日(周五)上午10:50
报告地点:生物科技楼441报告厅
主办单位:生物质分子工程中心;林学与园林学院
报告人简介:Mihaiela(Ela) C. Stuparu obtained her doctoral degree from ETH-Zürich. After a one-year postdoctoral stay with Prof. H. K. Hall Jr. at the University of Arizona, Mihaiela returned to Zürich and finished her habilitation work under the mentorship of Prof. J. S. Siegel at the University of Zürich. Since October 2014, Mihaiela is a Nanyang Assistant Professor at NTU Singapore. Here, her group is investigating utility of the corannulene motif for the preparation of functional soft materials.
报告内容:Corannulene (C20H10) is a polycyclic aromatic hydrocarbon that exhibits molecular curvature due to the arrangement of five six-membered rings around a central five-membered ring. It can, therefore, be considered as the cap region of fullerene C60. This is the reason, corannulene is sometime referred to as a ‘bucky-bowl’. The nonplanarity of the structure endows corannulene (and C60) with unique electronic properties that are not found in planar aromatic hydrocarbons such as naphthalene and pyrene. In contrast to C60, however, corannulene offers high solubility in common organic solvents and an avenue for multiple and well-defined substitutions on the aromatic nucleus. These two attributes are of high relevance to the synthetic and materials chemists as they allow for synthesis and unambiguous structural characterization of the synthesized materials. In this presentation, we will describe synthesis and properties of a large family of corannulene derivatives.
 
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