带有PPE侧链的聚合物的合成及其发光性质的研究  

Synthesis of polymer with PPE side-chain and study on its property of photoluminescence

作　　者：王文忠[1] 黄鹏程[1] 

机构地区：[1]北京航空航天大学材料学院高分子及复合材料系,北京100083

出　　处：《化学研究与应用》2008年第3期316-319,共4页Chemical Research and Application

基　　金：国家自然科学基金项目(29974002)资助

摘　　要：有机共轭聚合物发光材料成为近年来多学科交叉研究的热点。作为共轭聚合物之一，聚对苯乙炔（Poly（p．phenyleneethynylene））（PPE）具有较高的电子亲合势、电致发光效率、对微量水和氧气稳定等优点，近年来受到很大的关注。PPE分子链间通过π-π堆积效应（π-πstacking）在浓溶液和固态形成聚集体和激基缔合物，会导致荧光发射谱红移、变宽，荧光量子效率降低，影响了其在发光材料方面的应用。防止聚集体和激基缔合物的形成是这方面研究的热点。研究模型化合物——单分散的苯乙炔齐聚物，是理解PPE性质的理想方法。将链段规整的苯乙炔齐聚物接枝到柔性主链上，Oligo （p-phenyleneethynylene）s （BPE and VPE ） were synthesized by using sonogashira cross-coupling reaction. Polymer with poly （p-phenyleneethynylene） side-chain PVP was prepared from VPE by the thermal addition polymerization of its terminal vinyl group on one end. The synthesized BPE and the PVP, which have the same chromophores, were study by photoluminescence in their solutions and their solid states. The results showed that the PL emission belong to aggregates and excimers emission when the oligomer and polymer in relatively dense solution （ - 10^-1 g/L） and the solid states, repectively. The aggregates and excimers emission disappears when the oligomer is in the dilute solution （ - 3. 8 × 10^-4 g/L）. In contrast, the aggregates and excimers emission of the PVP was found in dilute solution （4. 0 × 10%-4 g/L）. However, the aggregates and excimers emission of the side chains of PVP nearly disappears in the solid state after PVP had been quenched from 280 ℃ （ ten degrees higher than its clear point）. The PL emission of BPE still attributes to aggregates and excimers emission in the solid state after it had been quenched from 295 ℃ （ten degrees higher than its clear point）. Thus, it is concluded that the flexible main-chain of PVP can effectively suppresses aggregates and excimers formation of the chromophores in solid state after the polymer had been quenched from 280 ℃.

关 键 词：聚对苯乙炔 激基缔合物 光致发光 

分 类 号：O632.7[理学—高分子化学]