刚柔嵌段共聚物聚苯基喹啉-b-聚苯乙烯的合成及荧光性质  

The synthesis of rod-coil block copolymers of poly(phenylquinoline)-b-polystyrene and its fluoresence property

作　　者：龙永福[1] 谢凯[1] 张学骜[1] 许静[1] 肖加余[1] 

机构地区：[1]国防科技大学材料工程与应用化学系,长沙410073

出　　处：《化工新型材料》2005年第5期18-21,共4页New Chemical Materials

基　　金：国家973资助项目(5130702002)

摘　　要：利用原子转移自由基聚合合成了端羧基聚苯乙烯,然后与4氨基苯乙酮反应,生成末端为乙酰基的聚合物,以P2O5为催化剂,将功能化的聚合物与5乙酰基2氨基二苯甲酮共聚,合成出刚柔嵌段共聚物聚苯基喹啉b聚苯乙烯(PPQ-b-PS)。用IR、1HNMR对其结构进行了表征,并对PPQ-b-PS在三氟乙酸/二氯甲烷稀溶液中的荧光性质进行了初步研究。结果表明:1mg·ml-1的PPQ-b-PS(1∶1氟乙酸/二氯甲烷,v/v)在459nm作监控波长下测量的激发光谱,430nm处有最大发射波长,相对强度为509,PPQbPS可实现可见光的激发。最大发射波长随着溶液浓度的升高而变大,即发生了红移,与混合溶剂的配比无关。Polystyrene terminated with carboxyl group was synthesized by atom transfer radical polymerization(ATRP), and the carboxylic acid terminated PS(PS-COOH) was functionalized by reacting with 4-aminoacetophenone and obtained the ketone methylene-terminated polystyrene. Rod-coil block copolymers of poly(phenylquinoline)-b-polystyrene(PPQ-b-PS) was synthesized by copolymerization of 5-acetyl-2-aminobenzophenone with the functionalized polystyrene by P_2O_5 catalyst. The structure and properties of PPQ-b-PS diblock copolymers were characterized by IR, 1HNMR,. and the fluoresence property of the PPQ-b-PS copolymers in the trifluoroacetic acid /chloroform (1mg·ml^(-1) 1∶1TFA∶DCM,v/v) was studied elementarily. The results showed that the excition and emission peaks of the PPQ-b-PS(1mg·ml^(-1) 1∶1TFA∶DCM,v/v)were at 468nm and 434nm,respectively,the relative intensity were 186. PPQ-b-PS were emited by visable light.The largest emission peaks increased when the concentration 0f PPQ-b-PS increased. The largest emission peaks were not influenced by the proportion of solvent.

关 键 词：嵌段共聚物 聚苯乙烯 荧光性质 聚苯基 5-乙酰基-2-氨基二苯甲酮 喹啉 原子转移自由基 4-氨基苯乙酮 二氯甲烷 发射波长 1HNMR 聚合合成 P2O5 三氟乙酸 激发光谱 相对强度 溶液浓度 混合溶剂 聚合物 端羧基 催化剂 功能化 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] O631.1[理学—高分子化学]