Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, and PRESTO, Japan Science and Technology Agency (JST), Nishikyo-ku, Kyoto 615-8510, Japan.
J Am Chem Soc. 2009 Dec 23;131(50):18046-7. doi: 10.1021/ja908783f.
We have recently developed a new method for synthesizing polyrotaxanes with a high covering ratio, rigidity, photoluminescence efficiency, and solubility in a variety of organic solvents through the polymerization of structurally defined rotaxane monomers. The rigid rodlike structure of the pi-conjugated core polymers in these polyrotaxanes is thought to facilitate the effective transport of charge carriers. Here we applied this method to the synthesis of a polyrotaxane having a poly(phenylene ethynylene) backbone by the Sonogashira copolymerization of a structurally defined rotaxane with a linker molecule. According to time-resolved microwave conductivity and transient absorption spectroscopy measurements, the hole mobility along the pi-conjugated polymer chain of the polyrotaxane thus formed was extremely high and comparable to that in amorphous silicon.
我们最近开发了一种新方法，通过结构确定的轮烷单体的聚合，合成具有高覆盖率、刚性、光致发光效率和在各种有机溶剂中溶解性的聚轮烷。这些聚轮烷中π共轭核聚合物的刚性棒状结构被认为有利于载流子的有效输运。在这里，我们通过结构确定的轮烷与连接分子的 Sonogashira 共聚反应，将该方法应用于合成具有聚(苯乙炔)主链的聚轮烷。根据时间分辨微波电导率和瞬态吸收光谱测量，由此形成的聚轮烷中沿π共轭聚合物链的空穴迁移率极高，可与非晶硅相媲美。
