3，5-二硝基水杨酸铕／聚合物的合成及光致发光性能  

Synthesis and Photo-Luminescence Properties of 3,5-Dinitro Salicylic Acid Europium/Polymer Materials

作　　者：林美娟[1] 王文[1] 章文贡[1] 

机构地区：[1]福建师范大学化学与材料学院,福建省高分子材料重点实验室,福州350007

出　　处：《应用化学》2011年第8期879-886,共8页Chinese Journal of Applied Chemistry

基　　金：福建省纳米重大专项(2005HZ01-5)项目资助

摘　　要：合成了3,5-二硝基水杨酸铕配合物(EuDNS)及其聚合物材料,通过元素分析和红外光谱等测试技术推测了配合物的结构,考察了配合物的用量和聚合物基质对聚合物材料荧光性能的影响。结果表明,配合物EuDNS可能存在的螯合杂环结构使其有较宽的紫外吸收,且与其荧光激发波长能较好的吻合,能发射很强的稀土Eu3+离子特征红光;当EuDNS质量分数为0.25%时,EuDNS/PMMA(甲基丙烯酸甲酯)聚合物材料仍有很强的荧光强度;3种不同聚合物基质中,最强发射峰强度顺序为:P(MMA-co-St)>PMMA>P(MMA-co-AA),丙烯酸(AA)共聚单体会强烈猝灭材料发光;EuDNS对MMA/St自由基共聚有阻聚和缓聚作用,随苯乙烯(St)的比例提高,阻聚作用增大,且材料透明性降低;与EuDNS配合物相比,EuDNS/PMMA聚合物材料形成后表观荧光寿命延长了467.5μs。3,5-Dinitro salicylic acid Eu（ Ⅲ ） complex（EuDNS） and its polymer composites were synthesized. The complex and polymers were characterized by elemental analysis, IR, UV-Vis methods. Effects of the complex content and polymer materials on the fluorescence property were studied. The complex may form a chelate heterocyclic structure and result in a wide UV-Vis absorption band that is well matched to excited wavelength, so that the complex can emit strong characteristic red luminescence of Eu （ Ⅲ ） ion. Even if the mass fraction of complex is 0.25% , EuDNS/PMMA（ PMMA ：polymethyl-methacrylate） polymer has still very strong fluorescence property. The order of the emission from strong to weak for the eopolymers is ： P（ MMA-co- St） 〉 PMMA 〉 P （MMA-co-AA） （ AA ： acrylic acid）. The acrylic acid eomonomer can quench luminescence. The results show the inhibition and retardation effects of the complex on free radical eopolymerization of styrene/methyl methacrylate initiated with azobisisbutyronitrile at 60℃, and the inhibition effect increases with the increasing styrene （St） comonomer content, whereas P （MMA-co-St） transparence decreases. The EuDNS/PMMA polymer has a longer apparent fluorescent lifetime than the corresponding complex.

关 键 词：二硝基水杨酸 稀土铕 配合物 聚合物 光致发光 

分 类 号：O625.5[理学—有机化学] O631[理学—化学]