Straightforward Synthesis of Conjugated Block Copolymers by Controlled Suzuki-Miyaura Cross-Coupling Polymerization Combined with ATRP

被引:13
|
作者
Huber, Steffen [1 ]
Mecking, Stefan [1 ]
机构
[1] Univ Konstanz, Dept Chem, Chair Chem Mat Sci, Univ Str 10, D-78464 Constance, Germany
关键词
TRANSFER RADICAL POLYMERIZATION; CHAIN-GROWTH POLYMERIZATION; LIGHT-EMITTING-DIODES; PHOSPHONIC-ACIDS; MOLECULAR-WEIGHT; POLYFLUORENE; POLYTHIOPHENE; POLY(3-HEXYLTHIOPHENE); FUNCTIONALIZATION; TRANSPORT;
D O I
10.1021/acs.macromol.9b01165
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Catalytic chain growth Suzuki-Miyaura polymerization of an AB-fluorene monomer using isolated (Ini1) or in situ generated (Ini2) Phos-Ph-Pd((Bu3P)-Bu-t)Br as an initiator afforded well-defined heterodifunctional polyfluorenes featuring a phosphonate group (initiating chain end) and a radically polymerizable (Phos-PF8-Sty) or atom transfer radical polymerization (ATRP)-initiating (Phos-PF8-AlkylBr) group (terminating chain end). The resulting Phos-PF8-AlkylBr polymer was directly employed for the growth of a second nonconjugated block by controlled activators regenerated by electron transfer ATRP without the need for further intermediate conversion steps. The PF8 macroinitiator was found to be a viable initiator for the generation of narrowly distributed diblock copolymers with a controlled block length of PF8 and polystyrene, poly(methyl methacrylate), or poly(2-ethylhexyl methacrylate), respectively. Novel conjugated nonconjugated comb polymers were generated by controlled radical copolymerization of PF8 macromonomers, bearing a styrene end group, with styrene or methacrylates. Thereby, it was possible to tune the number of phosphonate moieties per chain between 2 and 15.
引用
收藏
页码:5917 / 5924
页数:8
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