Precise One-Pot Synthesis of End-Functionalized Conjugated Multi-Block Copolymers via Combined Olefin Metathesis and Wittig-type Coupling
Precise One-Pot Synthesis of End-Functionalized Conjugated Multi-Block Copolymers via Combined Olefin Metathesis and Wittig-type Coupling
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DOI：
10.1021/ma4022554
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发表时间：
2013-12
期刊：
影响因子：
5.5
通讯作者：
K. Nomura;Tahmina Haque;Taira Onuma;Fatin Hajjaj;M. Asano;A. Inagaki
中科院分区：
文献类型：
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作者：
K. Nomura;Tahmina Haque;Taira Onuma;Fatin Hajjaj;M. Asano;A. Inagaki
以聚（9，9-二正辛基芴-2，7-亚乙烯基）（PFV）为嵌段，以低聚（2，5-二烷氧基-1，4-亚苯基亚乙烯基）或三噻吩单元为中间链段，通过烯烃复分解反应合成了末端官能化的嵌段共聚物。嵌段共聚物的形成和末端官能化的定量效率可以通过在两个聚合物链末端含有聚（乙二醇）的两亲性嵌段共聚物的合成来确认。研究了PFV共轭长度、中间链段和末端基团对聚合物发光性能的影响：在链端含有二茂铁基团的聚合物显示出独特的发光/猝灭性能。
A precise, one-pot synthesis of end-functionalized block copolymers consisting of poly(9,9-di-n-octylfluorene-2,7-vinylene)s (PFVs) and oligo(2,5-dialkoxy-1,4-phenylenevinylene) or terthiophene units as the middle segment have been prepared by olefin metathesis of the vinyl group in the PFV chain ends followed by subsequent Wittig-type coupling. Formation of the block copolymers and the quantitative efficiency in the end-functionalization can be confirmed by synthesis of amphiphilic block copolymers containing poly(ethylene glycol) at the both polymer chain ends. Effect of PFV conjugation length, middle segment, and the end groups toward the emission properties have been studied: the polymers containing ferrocene moiety at the chain ends displayed unique emission/quenching properties.