Synthesis and characterization of poly(methyl acrylate) grafted from poly(thiophene) to form solid-state fluorescent materials

被引:48
作者
Costanzo, PJ [1 ]
Stokes, KK [1 ]
机构
[1] Carnegie Mellon Univ, Dept Chem, Ctr Macromol Engn, Pittsburgh, PA 15213 USA
关键词
D O I
10.1021/ma011638d
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
This paper describes the synthesis and characterization of graft copolymers having a poly(thiophene) (PT) backbone with poly(methyl acrylate) (pMA) sidearms. Thiophene monomer containing a protected alcohol group was prepared and polymerized via the McCullough method to yield regioregular PT. The backbone was then functionalized to contain an atom-transfer radical polymerization (ATRP) initiator at approximately 90% of the repeat units as determined through H-1 NMR analysis, yielding 2,5-poly(3-[1-ethyl-2-(2-bromopropionate)]thiophene). From these initiator sites, MA was polymerized to yield well-defined polymer brushes. The addition of the sidearms to the thiophene backbone resulted in twisting of the backbone as a result of steric effects, which caused a decrease in conjugation length of the PT. In the solid state, the sidearms trap the PT in a "solution-like" conformation. In addition, these arms serve to separate PT chains and disrupt the ordered array usually seen in regioregular PT. With a lower conjugation length and isolated PT chains, the material achieved a photoluminescent yield of up to 40% in the solid state.
引用
收藏
页码:6804 / 6810
页数:7
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