摘要
用Suzuiki聚合反应将二溴代吡啶 (2 ,5 、2 ,6 、3,5 取代 )与芴共聚 ,合成了不同主链结构的吡啶 芴共聚物 .研究结果表明 ,将吡啶基引人聚芴主链可以调节共聚物的发光颜色 .间位吡啶基引入聚芴主链 ,使聚合物的能级加宽 ,PL、EL光谱发生蓝移 ;对位吡啶基则使光谱红移 .间位吡啶基 (3,5 Py、2 ,6 Py)引入聚芴主链 ,可提高聚合物的色纯度 .共聚物中 3,5 Py含量为 4 0mol%时 ,可得到较纯的蓝光 .
A series of high molecular weight, readily soluble copolymers of 9,9-dioctylfluorene with pyridine are synthesized by Suzuki polycondensation. The results indicate that the light-emitting color of the polymers could be midified by the introduction of pyridine units into the polyfluorene backbone. The energy levels of the polymers are widened, and PL, EL spectra are blue-shifted by the introduction of the meta-pyridine groups. However, the PL, EL spectra are red-shifted by the introduction of para-pyridine groups. The introduction of pyridine units at 3,5- or 2,6-position. into polyfluorene backbone significantly depresses the excimer formation. The intensity of excimer emission decreases with increasing 3,5-pyridine content. Narrow and pure blue EL emission is obtained for the copolymer with 3,5-pyridine content of 40 mol %. Therefore, meta-pyridine-co-fluorene copolymers are promising blue-emitting electroluminescent materials.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第2期177-180,共4页
Acta Polymerica Sinica
基金
国家自然科学基金 (基金号 5 0 173 0 0 8)
广东省自然科学基金 (基金号 0 115 45 )
科技部 973计划 (项目号 2 0 0 2CB613 40 2 )资助项目
