Electrochemical and electroluminescent properties of random copolymers of fluorine- and alkoxy-substituted poly(p-phenylene vinylene)s

被引:26
作者
Riehn, R
Morgado, J
Iqbal, R
Moratti, SC
Holmes, AB
Volta, S
Cacialli, F
机构
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Inst Super Tecn, Dept Engn Quim, P-1049001 Lisbon, Portugal
[3] Univ Cambridge, Dept Chem, Chem Lab, Cambridge CB2 1EW, England
[4] Melville Lab Polymer Synth, Cambridge CB2 3RA, England
[5] Univ Jena, Inst Organ Chem & Makromol Chem, D-07743 Jena, Germany
关键词
D O I
10.1021/ma992147k
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We report the synthesis and electroluminescent properties of random poly(phenylenevinylene) copolymers, carrying fluorine substitutions. In particular, we used 2,3,5,6-tetrafluoro-1,4-phenylenevinylene and 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene moieties. The ratios of the two copolymer units were varied between 5:95 and 27:75. Electrochemical measurements showed an increase of the oxidation and a decrease of the reduction potentials of the copolymers upon increase of the fluorine content, as expected for the electron withdrawing effect of fluorine on the conjugated ir-electron system. The copolymers showed emission in the red-orange region, with maximum photoluminescence efficiencies of 6.7%. We also observed lower turn-on voltages and higher electroluminescence efficiencies for lower fluorine contents.
引用
收藏
页码:3337 / 3341
页数:5
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