题 目：Chemistry of a Rigid H-Shaped π-Scaffold 报告人：Professor Jye-Shane Yang; Department of Chemistry, National Taiwan University, Taiwan 时 间：2014年10月10号（星期五）上午10:00 地 点：唐仲英楼B501，联系人：沈珍教授，zshen@nju.edu.cn 内容简介：Pentiptycene is a rigid H-shaped π-scaffold, containing a central phenylene ring that is sterically shielded by four peripheral phenylene rings. Such a unique structural feature has led us to explore its possible applications. For example, its paddlewheel-like shape can function as a 4-bladed molecular rotor in molecular devices such as molecular wires, brakes, gears, and motors. The bulkiness of pentiptycene can also tune the conformation and thus the electronic properties of the resulting π-conjugated systems. The synthesis ofpentiptycene derivatives relies on the central-ring prefunctionalizedpentiptycene building blocks. A useful approach toward the preparation of these building blocks is the derivatization of pentiptycenequinone. In this lecture, the story of our pentiptycene chemistry, synthesis and application, will be presented with an emphasis of the design concept. |