Chain-Growth Synthesis of Polyfluorenes with Low Polydispersities, Block Copolymers of Fluorene, and End-Capped Polyfluorenes: Toward New Optoelectronic Materials

被引:96
作者
Javier, Anna E. [1 ]
Varshney, Swati R. [1 ]
McCullough, Richard D. [1 ]
机构
[1] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA
基金
美国国家科学基金会;
关键词
CATALYST-TRANSFER POLYCONDENSATION; POLYMERIZATION; PHOTOLUMINESCENCE; MECHANISM;
D O I
10.1021/ma100519g
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Here we present the kinetics on the polymerization of poly(9,9-dioctylfluorene) using the Grignard metathesis method (GRIM). By adjusting the reaction conditions, we observed a chain-growth mechanism evidenced by the relatively high molecular weight polymer produced early in the reaction. Well-defined fluorene polymers with average molecular weights of about 10 kDa and with PDI values <1.2 have been produced. We have also found that under certain conditions end-capping of the polymer chain can be obtained. Using these conditions, we have also been able to synthesize two new block copolymers, poly(9,9-dioctyltluorene)-b-poly(3-hexylthiophene) (PF8-b-P3HT) and poly(9,9-dioctylfluorene)-b-poly(1,4-dioctyloxyphenylene) (PF8-b-PPP), that have been produced through chain extension by monomer addition.
引用
收藏
页码:3233 / 3237
页数:5
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