合成了一种含有喹啉和香豆素基团且发射蓝光的发光材料(QCC),通过紫外-可见吸收光谱和荧光发射光谱对QCC的光物理性质进行了测试.结果表明QCC的最大吸收峰为330 nm,且在360~540 nm内具有强的荧光发射带.随着溶剂极性的增加,QCC的荧光发射峰出现明显的红移.通过荧光猝灭技术分别观察了QCC与电子给体(DMA)和电子受体(DMTP)之间的相互作用,结果表明QCC具有优良的电子转移性能.进一步研究了QCC与碳70(C70)和碳纳米管(CNTs)的相互作用.利用高斯(Gaussian)09软件计算了QCC的电子能级分布情况,所得理论计算结果与电化学循环伏安法测得的结果基本一致.此外,QCC展示了良好的热稳定性,其热分解温度(td)为270 ℃.上述所得结果表明,QCC可作为潜在的蓝色有机发光二极管器件的发光材料.
A blue luminescent material named QCC that contains quinoline and coomarin units was synthesized. The photophysical property of QCC was investigated by the UV-vis absorption and fluorescence emission spectra, which indicates that QCC can emit blue light. With the increase of polarity of solvents, the emission wavelength of DCC shows an obvious red-shift. Besides, we investigated the interactions between QCC and electron donor N, N'-dimethylaniline(DMA), electron acceptor(DMTP)using fluorescence quenching technique, which demonstrates that QCC has excellent electron transfer property. At the same time, the interactions of QCC with C70 and CNTs were also investigated to confirm the above property, respectively. The electrochemical property and energy levels of QCC were calculated by Gaussian 09 software, and the results basically conform with the data measured by cyclic voltammetry method.Thermal stability study reveals that QCC has good thermal stability with thermal decomposition temperature(td)of 270 ℃. These results indicate the QCC has the potential in the construction and application of blue organic light emitting diodes(OLEDs).
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