Liu Junchen, Zhong Xueming, Xu Yuna, Li Yanrong
School of Environmental & Chemical Engineering Nanchang Hangkong University Nanchang 330063 China.
Glob Chall. 2019 Sep 6;3(12):1900052. doi: 10.1002/gch2.201900052. eCollection 2019 Dec.
Using high-energy UV-light to excite 8-hydroxyquinoline barium (BaQ) is a short slab for this emerging area of organic luminescent materials. However, using visible light to excite BaQ has not been reported. To solve this problem, this study proposes the mechanochemical activation method to synthesize luminescent material of visible-light-excited BaQ. This research applies infrared spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, and fluorescence spectrometry to analyze the structure and luminescence properties. XRD shows that BaQ has a high crystallinity, small crystalline size, and high purity. According to the Scherrer equation, the mean particle size is 56 nm. The results of fluorescence spectrometry show that the excitation spectrum of the product is red-shifted, and the maximum excitation wavelength is 408 nm. According to these results, the product has a high fluorescence and can be excited under visible light. This research explains the high efficiency of the mechanochemical-activation method by thermodynamic and dynamic principles. This research also exemplifies luminescence theory of BaQ and at the microlevel explains the theory of visible-light-excited theory and the principle of luminescent intensity enhancement from the point of crystallography.
利用高能紫外光激发8-羟基喹啉钡（BaQ）是这一新兴有机发光材料领域的一个短板。然而，利用可见光激发BaQ尚未见报道。为解决这一问题，本研究提出采用机械化学活化法合成可见光激发的BaQ发光材料。本研究应用红外光谱、X射线衍射（XRD）、X射线光电子能谱、扫描电子显微镜、能量色散光谱和荧光光谱对其结构和发光性能进行分析。XRD表明，BaQ具有高结晶度、小晶粒尺寸和高纯度。根据谢乐方程，平均粒径为56nm。荧光光谱结果表明，产物的激发光谱发生红移，最大激发波长为408nm。根据这些结果，该产物具有高荧光性，且能在可见光下被激发。本研究从热力学和动力学原理出发解释了机械化学活化法的高效性。本研究还例证了BaQ的发光理论，并在微观层面从晶体学角度解释了可见光激发理论和发光强度增强原理。
