A processible poly(phenyleneethynylene) with strong photoluminescence: Synthesis and characterization of poly[(m-phenyleneethynylene)-alt-(p-phenyleneethynylene)]
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作者:
Pang, Y
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Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USAClark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
Pang, Y
[1
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Li, J
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机构:Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
Li, J
Hu, B
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机构:Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
Hu, B
Karasz, FE
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机构:Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
Karasz, FE
机构:
[1] Clark Atlanta Univ, Dept Chem, Atlanta, GA 30314 USA
[2] Clark Atlanta Univ, Ctr High Performance Polymers & Composites, Atlanta, GA 30314 USA
[3] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
The synthesis of poly[(m-phenyleneethynylene)-alt-(p-phenyleneethynylene)] via the Heck-type coupling of 2,5-bis(hexyloxy)-1,4-diiodobenzene with 1,3-diethynylbenzene was investigated. The combination of high molecular weight, normal polydispersity, and monomodal distribution suggested that cyclic products were not formed during the polymerization. The observed low Mark-Houwink exponent was rationalized in terms of the bond angles at the m-phenylene, which was significantly smaller than that of the 2,5-thienylene unit.