Synthesis of conjugated - Ionic block copolymers by controlled radical polymerization

被引:78
作者
Lu, S
Fan, QL
Chua, SJ
Huang, W
机构
[1] Fudan Univ, Inst Adv Mat & Technol, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Macromol Sci, Shanghai 200433, Peoples R China
[3] Natl Univ Singapore, IMRE, Singapore 117602, Singapore
关键词
D O I
10.1021/ma020408b
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A novel series of well-defined amphiphilic block copolymers containing conjugated poly(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl metbacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrate end-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) as the catalyst. The first-order kinetics plot indicated a constant number of active species present in the polymerization. The molecular weight and molecular weight distribution were well controlled, implying well-defined block structure of the prepared block copolymers. The chemical structures of the copolymers were confirmed by H-1 NMR studies. The copolymers could be successfully quanternized, and the final conjugated-ionic block copolymers were found to form PF aggregates in water as confirmed by 1H NMR, UV-vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement also suggested the formation of excimers within the PF aggregates.
引用
收藏
页码:304 / 310
页数:7
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