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通过高分子反应法研究制备了高分子化的8-羟基喹啉铝发光材料.首先使用自制的氯甲基化试剂1,4-二氯甲氧基丁烷(BCMB),制备了5-氯甲基-8-羟基喹啉(CHQ);通过聚苯乙烯(PS)与CHQ之间的Friedel-Crafts烷基化反应,制得侧链键合有8-羟基喹啉(HQ)的改性聚苯乙烯HQ-PS;再使HQ-PS与二配体的8-羟基喹啉铝配合物Alq2发生配位反应,制得了含8-羟基喹啉铝配合物的聚苯乙烯发光材料Alq3-PS,即实现了8-羟基喹啉铝配合物Alq3的高分子化;并采用红外光谱(FTIR)、核磁共振氢谱(1H-NMR)、紫外光谱(UV)及热失重分析(TGA)等方法对其结构和性能作了表征,还测定了该发光材料的光致发光性能.重点考察了各种反应条件对在PS侧链键合8-羟基喹啉的影响规律,优化了反应条件.实验结果表明,5-氯甲基-8-羟基喹啉与聚苯乙烯之间的Friedel-Crafts反应可顺利进行,适宜的反应条件为70℃,以N,N-二甲基甲酰胺(DMF)为溶剂,以SnCl4为催化剂.高分子化的8-羟基喹啉铝配合物Alq3-PS具有Alq3的荧光发射光谱,且具有比聚苯乙烯更高的热稳定性.
A polymer-based 8-hydroxyquinoline aluminum luminescent material was prepared by macromolecule reaction method.Firstly, 5-chloro-5-chloroquinolinol Methyl-8-hydroxyquinoline (CHQ); modification of the side chain bonded 8-hydroxyquinoline (HQ) by Friedel-Crafts alkylation between polystyrene (PS) and CHQ Polystyrene HQ-PS; and then HQ-PS and the two ligand 8-hydroxyquinoline aluminum complex Alq2 coordination reaction to obtain a 8-hydroxyquinoline aluminum complex polystyrene light-emitting material Alq3- PS, that is, the molecularization of Alq3, an 8-hydroxyquinoline aluminum complex, was achieved. FTIR, 1H-NMR, TGA, The structure and properties were characterized and the photoluminescence (PL) properties of the luminescent materials were also measured.The influence of various reaction conditions on the bonding of 8-hydroxyquinoline in PS side chain was investigated emphatically, and the reaction conditions were optimized. The experimental results show that the Friedel-Crafts reaction between 5-chloromethyl-8-hydroxyquinoline and polystyrene can proceed smoothly. The suitable reaction conditions are 70 ℃, N, N-dimethylformamide )for Agents to SnCl4 as catalyst. The polymer of 8-hydroxyquinoline aluminum complex having Alq3-PS fluorescence emission spectra of Alq3 and having a higher thermal stability than the polystyrene.