一种侧基横挂偶极单元的聚苯撑乙炔的光学性质  

Optical Properties of Poly(p-phylene ethylene)s with Laterally Attached Dipolar Unit

作　　者：王金涛[1] 李春晖[1] 赵坤[1] 王勃[1] 王成智[1] 陈星鹏[1] 郑世军[1] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450052

出　　处：《应用化学》2010年第8期899-902,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20574064);河南省材料物理教育部重点实验室开放研究课题;河南省有机生物重点实验室资助项目

摘　　要：以对苯二乙炔和2,5-二溴苯衍生物为单体,无水N,N-二甲基甲酰胺(DMF)为溶剂,通过Sonogashira偶联反应,采用2种Pd催化剂(Pd(PPh3)4和PdCl2(PPh3)2)合成了一种侧基带有偶极基团的聚苯撑乙炔。单体的化学结构通过IR、NMR和元素分析等测试技术得到确证。聚合物外观为黄色粉状固体,室温下溶于CHCl3和THF等有机溶剂。2种Pd催化剂对合成聚合物的分子量以及光学性质影响不大,但对聚合物的发光效率影响较大。不同溶剂环境以及聚合物固体膜的紫外以及荧光光谱研究结果表明,侧基偶极基团的相互静电排斥力,可以有效阻止大分子链之间的聚集,从而有效地抑制了聚苯撑乙炔聚集体的形成。Poly （ p-phenylene ethylene） s containing laterally attached push-pull unit were synthesized by Sonogashira coupling reaction in the presence of different Pd catalysts（ Pd（ PPh3 ）4 and PdCl2 （ PPh3 ）2,PPh： P（C6H5）3）. The structures and properties of the intermediate were identified by elemental analysis,IR, NMR,and so on. The polymers are soluble in common organic solvents and exhibits blue fluorescence. It has been found that the polymers prepared in the presence of different Pd catalysts have similar molecular mass and optical properties. The fact that the absorption maximum wavelength and emission maximum wavelength do not chang with the increase of the concentration of the polymers implies the electrostatic repulsion among the side chains can restrain the formation of aggregates. The optical study of the solid film of the polymers has supported the result.

关 键 词：聚苯撑乙炔 聚集体 偶基单元 

分 类 号：O631.2[理学—高分子化学]