Hyperbranched Blue to Red Light-Emitting Polymers with Tetraarylsilyl Cores: Synthesis, Optical and Electroluminescence Properties, and ab Initio Modeling Studies
Hyperbranched Blue to Red Light-Emitting Polymers with Tetraarylsilyl Cores: Synthesis, Optical and Electroluminescence Properties, and ab Initio Modeling Studies
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DOI：
10.1021/ma047686q
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发表时间：
2005-04
期刊：
影响因子：
5.5
通讯作者：
Xueming Liu;Tingting Lin;Junchao Huang;X. Hao;K. Ong;Chaobin He
中科院分区：
文献类型：
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作者：
Xueming Liu;Tingting Lin;Junchao Huang;X. Hao;K. Ong;Chaobin He
以AB 4型四面体单体[四（4-溴联苯）硅烷（1）和四（2-溴-9，9-二己基芴基）硅烷（2）]与AB 2型二溴或二硼酸单体9，9-二己基芴或低聚噻吩通过Suzuki或Grignard偶联缩聚反应合成了一系列超支化交替共聚物。聚合物（3，5 - 8）（分别衍生自1和9，9-二己基芴-2，7-二硼酸、2，2 '-联噻吩-5，5'-二硼酸、2，2 '：5'，2 "-三噻吩-5，5"-二硼酸、5，5 '-二溴-3，3'-二己基-2，2 '-联噻吩和5，5 "-二溴-3，3'-二己基-2，2 '：5'，2"-三噻吩）在固态下发射蓝光至红光，并且它们的吸收和发射最大值随着共轭长度的增加而红移。聚合物4（由2和9，9-二己基芴-2，7-二硼酸合成）在溶液和凝聚态下都能高效发射蓝光，但其最大吸收和发射峰与聚合物3相比发生了轻微的蓝移，表明聚合物4具有较好的发光性能。
A series of hyperbranched alternating copolymers were synthesized by either Suzuki or Grignard coupling polycondensation reactions between two AB4-type tetrahedral monomers [tetra(4-bromobiphenyl)silane (1) and tetra(2-bromo-9,9-dihexylfluorenyl)silane (2)] with AB2-type dibromo or diboronic acid monomers of 9,9-dihexylfluorene or oligothiophenes. Polymers (3, 5−8) (derived from 1 and 9,9-dihexylfluorene-2,7-diboronic acid, 2,2‘-bithiophene-5,5‘-diboronic acid, 2,2‘:5‘,2‘ ‘-terthiophene-5,5‘ ‘-diboronic acid, 5,5‘-dibromo-3,3‘-dihexyl-2,2‘-bithiophene, and 5,5‘ ‘-dibromo-3,3‘-dihexyl-2,2‘:5‘,2‘ ‘-terthiophene, respectively) emitted blue to red light in the solid state and their absorption and emission maxima were red shifted with the increase in conjugation length. Polymer 4 (derived from 2 and 9,9-dihexylfluorene-2,7-diboronic acid) emitted blue light highly efficiently in both solution and the condensed state, but its absorption and emission maxima were slightly blue-shifted from those of 3, revealing t...