Synthesis and properties of conjugated polymers containing 3,9- and 2,9-linked carbazole units in the main chain
Synthesis and properties of conjugated polymers containing 3,9- and 2,9-linked carbazole units in the main chain
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DOI：
10.1002/pola.23431
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发表时间：
2009-07
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影响因子：
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通讯作者：
Kosaku Tamura;M. Shiotsuki;Norihisa Kobayashi;T. Masuda;F. Sanda
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文献类型：
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作者：
Kosaku Tamura;M. Shiotsuki;Norihisa Kobayashi;T. Masuda;F. Sanda
通过乙炔基和碘代取代的9-亚芳基咔唑单体的缩聚反应，合成了主链含3，9-或2，9-连接咔唑单元的新型共轭聚合物，并研究了它们的光学和电学性质。通过在哌啶或四氢呋喃（THF）/哌啶中在30 ° C下进行Sonogashira偶联缩聚48 h，以76 - 99%的产率获得重均分子量为3400 - 12，000的聚合物。所有的3，9-连接的聚合物吸收300 nm左右的光。对亚苯基连接的聚合物也吸收350 nm左右的光，而间亚苯基连接的聚合物则没有。3，9-连接的聚合物吸收波长比2，9-连接的聚合物长的光。聚合物在最大吸收处激发时发射具有高量子产率（0.21 - 0.78）的蓝色荧光。聚合物在0.6 V左右被氧化，在0.5 V左右被还原。Poly（1）的暗电导率为3.7 × 10 − 11 S/cm（103 V/cm）。© 2009 Wiley Periodicals，Inc. J Polym Sci A部分：Polym Chem 47：3506 - 3517，2009
Novel conjugated polymers containing 3,9- or 2,9-linked carbazole units in the main chain were synthesized by the polycondensation of ethynyl- and iodo-substituted 9-arylenecarbazolylene monomers, and their optical and electrical properties were studied. Polymers with weight-average molecular weights of 3400–12,000 were obtained in 76–99% yields by the Sonogashira coupling polycondensation in piperidine or tetrahydrofuran (THF)/piperidine at 30 °C for 48 h. All the 3,9-linked polymers absorbed light around 300 nm. The para-phenylene-linked polymer also absorbed light around 350 nm, while meta-phenylene-linked one did not. The 3,9-linked polymers absorbed light at a wavelength longer than the 2,9-linked one. The polymers emitted blue fluorescence with high quantum yields (0.21–0.78) upon excitation at the absorption maxima. The polymers were oxidized around 0.6 V, and reduced around 0.5 V. Poly(1) showed the dark conductivity of 3.7 × 10−11 S/cm (103 V/cm). © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 3506–3517, 2009