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Synthesis, properties and structure of borafluorene-based conjugated polymers with kinetically and thermodynamically stabilized tetracoordinated boron atoms
Polymer Journal ( IF 2.8 ) Pub Date : 2018-01-09 , DOI: 10.1038/s41428-017-0002-x
Takuya Matsumoto , Shunichiro Ito , Kazuo Tanaka , Yoshiki Chujo

AbstractHerein, borafluorene-conjugated polymers with a dibromoborafluorene monomer and various boronic acid ester comonomers are reported. By employing the Suzuki−Miyaura cross-coupling reaction, a series of copolymers was prepared with the boron atoms in tetracoordinated states. Based on comparison to the optical properties of gallafluorene copolymers, higher luminescence quantum yields were obtained from the synthesized borafluorene copolymers due to the weak spin-orbit interaction of boron compared to that of gallium. Additionally, the results from the electrochemical measurements indicated that the electron-withdrawing property of the boron atoms led to stabilization of the lowest unoccupied molecular orbitals (LUMOs) of the borafluorene copolymers. In the X-ray diffraction profiles, significant peaks originating from π−π stacking and assembly of the side chains were observed. The borafluorene copolymers were more crystalline than the gallafluorene polymers.Synthesis and properties of borafluorene-containing conjugated polymers with various comonomers are presented. From the comparison with the gallafluorene copolymers, higher luminescent quantum yields were obtained from the borafluorene copolymers. Additionally, from the electrochemical measurements, it was shown that the electron-withdrawing property of the boron atoms led to the stabilization of LUMOs of the borafluorene copolymers. In the X-ray diffraction profiles, the significant peaks originated from π−π stacking and assembly of the side chains were observed. The borafluorene copolymers were more crystalline materials relative to the gallafluorene polymers.

中文翻译:

具有动力学和热力学稳定的四配位硼原子的硼芴基共轭聚合物的合成、性质和结构

摘要本文报道了具有二溴硼芴单体和各种硼酸酯共聚单体的硼芴共轭聚合物。通过使用 Suzuki-Miyaura 交叉偶联反应,制备了一系列具有四配位状态的硼原子的共聚物。基于与镓芴共聚物的光学性质的比较,由于与镓相比,硼的自旋轨道相互作用较弱,因此从合成的硼芴共聚物获得了更高的发光量子产率。此外,电化学测量的结果表明,硼原子的吸电子特性导致硼芴共聚物的最低未占分子轨道(LUMO)稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。硼芴共聚物比镓芴聚合物结晶度更高。介绍了含硼芴共轭聚合物与各种共聚单体的合成和性能。与镓芴共聚物相比,硼芴共聚物具有更高的发光量子产率。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。硼芴共聚物比镓芴聚合物结晶度更高。介绍了含硼芴共轭聚合物与各种共聚单体的合成和性能。与镓芴共聚物相比,硼芴共聚物具有更高的发光量子产率。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。硼芴共聚物比镓芴聚合物结晶度更高。介绍了含硼芴共轭聚合物与各种共聚单体的合成和性能。与镓芴共聚物相比,硼芴共聚物具有更高的发光量子产率。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。介绍了具有各种共聚单体的含硼芴共轭聚合物的合成和性质。与镓芴共聚物相比,硼芴共聚物具有更高的发光量子产率。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。介绍了具有各种共聚单体的含硼芴共轭聚合物的合成和性质。与镓芴共聚物相比,硼芴共聚物具有更高的发光量子产率。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。此外,电化学测量表明,硼原子的吸电子特性导致硼芴共聚物的 LUMO 稳定。在 X 射线衍射图中,观察到源自 π-π 堆积和侧链组装的显着峰。相对于镓芴聚合物,硼芴共聚物是结晶度更高的材料。
更新日期:2018-01-09
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