Synthesis and characterization of conjugated triblock copolymers

Synthesis and characterization of conjugated triblock copolymers
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共轭三嵌段共聚物的合成与表征

DOI:
10.1002/pola.22003
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发表时间:
2007-06
期刊:
Journal of Polymer Science Part A
影响因子:
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通讯作者:
--
中科院分区:
其他
文献类型:
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采用两步钯催化Suzuki缩聚法(SPC)合成了一系列含空穴传输聚咔唑链段、电子传输聚恶二唑链段和发蓝光聚芴链段的共轭三嵌段共聚物。首先合成了二溴封端的聚合物前体(聚芴和聚恶二唑)作为中心结构单元。然后,将二溴封端的聚合物前体进一步与AB型单体[2-溴-7-甲基-2-(三氟甲基)苯基]聚合。(4,4,5,5-四甲基-1,3,2-二氧杂硼杂环戊烷-2-基)-9-辛基咔唑,3-溴-6-(4,5-四甲基-1,3,2-二氧杂硼杂环戊烷-2-基)-9-辛基咔唑,和2-溴-7-(三氟甲基)-2-(三氟甲基)苯基)咪唑;(4,4,5,5-四甲基-1,3,2-二氧杂硼杂环戊烷-2-基)-9,9-二辛基芴],以在SPC条件下获得目标三嵌段共聚物。通过凝胶渗透色谱和核磁共振谱证实了三嵌段共聚物的形成。三嵌段共聚物具有良好的热稳定性。的光物理性质的调查表明,有效的,光诱导的通过键的能量转移发生在这样的三嵌段共聚物系统。© 2007 Wiley Periodicals,Inc.聚合物科学杂志A部分:聚合物化学45:2410-2424,2007
A series of conjugated triblock copolymers containing hole-transporting polycarbazole segments, electron-transporting polyoxadiazole segments, and blue-light-emitting polyfluorene segments were prepared with a two-step palladium-catalyzed Suzuki polycondensation (SPC). First dibromo-terminated polymer precursors (polyfluorenes and polyoxadiazoles) were synthesized as the central buildingblocks. Then, the dibromo-terminated polymer precursors were further polymerized with AB-type monomers [2-bromo-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9-octylcarbazole, 3-bromo-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9-octylcarbazole, and 2-bromo-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-dioctylfluorene] to achieve the target triblock copolymers under SPC conditions. The formation of the triblock copolymers was confirmed by gel permeation chromatography and NMR spectroscopy. The triblock copolymers exhibited good thermal stability. An investigation of the photophysical properties indicated that efficient, photoinduced through-bond energy transfer occurred in such triblock copolymer systems. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 2410–2424, 2007
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影响因子: 29.4
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影响因子: 5.5
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DOI: 10.1016/s0040-4020(97)00973-3
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影响因子: 2.1
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