基于二苯甲酮衍生物的端羟基聚乳酸的双重发光性能

发布时间：2018-01-28 19:18

本文关键词： 二苯甲酮衍生物端羟基聚乳酸荧光室温磷光双重发光性能　出处：《高等学校化学学报》2016年08期 　论文类型：期刊论文

【摘要】：制备出2种含有单羟基的二苯甲酮类化合物:4-[(2-羟乙基)(甲基)氨苯基]苯甲酮(NBP)与(4-氯苯基)[4-(2-羟乙基)(甲基)氨基]苯甲酮(NBP-Cl),以此为引发剂引发D,L-丙交酯聚合制备不同分子量的聚乳酸(PLA),并对其进行结构表征和性能测试.光学测试结果表明,在室温条件下,NBP和NBP-Cl仅具有荧光发射性能,而PLA表现出荧光和室温磷光双重发光性能;重原子效应导致聚合物室温磷光增强,但磷光寿命减少;随着PLA分子量的减小,聚合物磷光寿命先增加后减少.PLA的热重分析数据显示其具有优异的热学性能,大大拓宽了该双重发光材料的应用范围.
[Abstract]:Two kinds of benzophenone compounds containing monohydroxyl groups were prepared. [2-hydroxyethyl (methyl) aminophenyl] benzophenone (NBP) and 4-chlorophenyl). [4-oxy-2-hydroxyethyl (methyl) amino] benzoone (NBP-ClN) was used as initiator to initiate the polymerization of DGL-lactide to prepare polylactic acid (PLA) with different molecular weight. The optical test results show that NBP and NBP-Cl have only fluorescence emission properties at room temperature. The PLA exhibits both fluorescence and room temperature phosphorescence. The heavy atom effect leads to the enhancement of the phosphorescence of the polymer at room temperature, but the phosphor lifetime decreases. With the decrease of molecular weight of PLA, the phosphorescence lifetime of the polymer increases first and then decreases. The thermogravimetric analysis results show that the polymer has excellent thermal properties, which greatly broadens the application range of the dual luminescent material.
【作者单位】：中国科学技术大学高分子科学与工程系;
【基金】：国家高技术研究发展计划项目(批准号:2015AA033903)资助~~
【分类号】：O633.14
【正文快照】： 近年来,具有荧光和磷光的光致发光体由于其优异的发光性能而受到广泛关注,并应用于传感器[1,2]、生物成像[3,4]及有机发光二极管(OLED)材料[5~7]等领域.磷光应用到光学传感器上有很多优势[8],与荧光相比,磷光有更大的Stokes位移,不易受寿命较短的荧光影响[9,10].Lehner等[11]

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