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首页> 外文期刊>Molecular Crystals and Liquid Crystals >Synthesis, Optical, and Electroluminescent Properties of Alternating Copolymer Based on Phenothiazine and Fluorene with Oxadiazole Pendant
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Synthesis, Optical, and Electroluminescent Properties of Alternating Copolymer Based on Phenothiazine and Fluorene with Oxadiazole Pendant

机译：吩噻嗪和芴与恶二唑类悬挂剂的交替共聚物的合成，光学和电致发光性质

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A new alternating copolymer based on phenothiazine-fluorene with aromatic 1,3,4-oxadiazole (OXD) as a side chain (poly(10-{4-[5-(4-tert-butyl-phenyl)-[1,3,4]oxadiazol-2-yl]-phenyl}-phenothiazine-3,7-diyl-alt-9,9-dihexyl-2,7-fluorene, PTOXDPF) was synthesized by the Suzuki coupling reaction. The maximum absorption wavelength of PTOXDPF solution showed at 410 nm which was dramatically blue-shifted than that of the polymer without OXD (poly(10-hexylphenothiazine-3,7-diyl-alt-9,9-dihexyl-2,7-fluorene, PTPF). This is due to that the presence of OXD pendant reduces the possibility of inter-chain interactions. The HOMO energy level of PTOXDPF estimated from the cyclic voltammetry was -5.13 eV, which was similar to the polymer without OXD pendant (PTPF). The OXD pendant does not affect HOMO energy level significantly. This is due to that oxidation potential of PTOXDPF dominated by the phenothiazine unit. The maximum efficiency and brightness of the electroluminescent (EL) device based on PTOXDPF (ITO/PEDOT/PTOXDPF/Al) were 45.4 cd/m2 and 5.21 × 10−2 cd/A, which were dramatically higher than PTPF (2.65 cd/m2 and 1.32 × 10−3 cd/A). This is presumably due to that the OXD pendant in PTOXDPF improves the electron transporting ability in the emissive layer.
机译：一种新的基于吩噻嗪芴并带有芳香族1,3,4-恶二唑（OXD）作为侧链的交替共聚物（聚（10- {4- [5-（4-叔丁基-苯基）-[1,3铃木偶联反应合成了（4，oxoxazazol-2-yl] -phenyl}-吩噻嗪-3,7-二基-alt-9,9-二己基-2,7-芴，PTOXDPF），最大吸收波长为PTOXDPF溶液在410 nm处显示出比没有OXD的聚合物（聚（10-己基吩噻嗪-3,7-二基-alt-9,9-二己基-2,7-芴，PTPF））明显蓝移。这是由于OXD侧基的存在降低了链间相互作用的可能性，由循环伏安法估算的PTOXDPF的HOMO能级为-5.13 eV，这与没有OXD侧基的聚合物（PTPF）相似。不会显着影响HOMO的能级，这是由于吩噻嗪单元占主导的PTOXDPF的氧化电势基于PTOXD的电致发光（EL）器件的最大效率和亮度PF（ITO / PEDOT / PTOXDPF / Al）分别为45.4 cd / m 2 和5.21×10 ˆ2 cd / A，显着高于PTPF（ 2.65 cd / m 2 和1.32×10 →3 cd / A）。据推测这是由于PTOXDPF中的OXD侧链提高了发射层中的电子传输能力。

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