摘要/Abstract

设计合成了系列含苯并咪唑单元的共轭结构化合物，用¹H NMR，¹³C NMR，MS和元素分析进行了结构表征，测试了它们的紫外吸收波长（λ_a）、荧光发射波长（λ_e）、荧光量子产率（Φ）和荧光寿命（τ），讨论了分子结构与其光谱特性之间的关系.结果表明这类化合物能够表现出较强的发光性能，Φ值最高者达到0.91.以1，4-二-[2-（1-苄基苯并咪唑基）]苯（5b）制作出的有机发光二极管（OLED），其发光主峰在448 nm，在电压23.8 V（875 mA•cm^－2）时最大亮度到达6790 cd•m^－2，最大电流功效1.17 cd•A^－1，最大功率效率0.96 lm•W^－1，最大外部量子效率0.92%，这些数据表明该类化合物作为OLED材料具有较大的潜在应用价值.
关键词: 苯并咪唑, 发光性能, 有机发光二极管(OLED)
A series of conjugated compounds containing imidazole structure units were designed and synthesized. Their structures were characterized by ¹H NMR, ¹³C NMR, MS and elemental analysis. Their UV absorption wavelength (λ_a), fluorescence emission wavelength (λ_e), fluorescence quantum yield (Φ) and fluorescence lifetime (τ) were determined, and the relationships between the molecular structures and its spectral data were discussed. The results showed that these compounds possess strong luminescence characteristic, and the maximum value of Φ is 91%. 1,4-Bis-(2-(1-benzylbenzimidazole))benzene (5b) was selected to fabricate organic light-emitting diode (OLED). Its main luminous peak is at 448 nm, the maximum brightness is 6790 cd•m^－2 when the voltage is 23.8 V (875 mA•cm^－2), the maximum current efficiency is 1.17 cd•A^－1, the maximum power efficiency is 0.96 lm•W^－1, and the maximum external quantum efficiency is 0.92%, which indicate that these compounds have great potential application value as OLED materials.
Key words: benzoimidazole, luminescent property, organic light-emitting diode (OLED)


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