二羟基丙基芴基聚合物合成及光电性能研究

The Synthesis and Photoelectric Property of Dihydroxypropyl-containing Polyfluorene Copolymers

通过Pd催化的Suzuki聚合反应制备了侧链上含有缩酮基团的芴基聚合物PFketal,对聚合物的酸性处理得到具有羟基基团的聚合物PFOH。通过FT-IR、1 H-NMR、凝胶渗透色谱(GPC)、紫外-可见吸收光谱(UV-Vis)、光致发光光谱(PL)和循环伏安(CV)测试对聚合物进行了表征。两种聚合物具有相似的光学性质,二者在薄膜状态下UV-Vis吸收峰位于387nm处,PL发射峰值为424nm。CV测试表明PFOH相对PFketal具有较低的起始氧化电位。羟基的引入可改善聚合物在极性溶剂中的溶解度,PFOH在PFketal的不良溶剂,如二甲基甲酰胺(DMF)和二甲基亚砜(DMSO)中均具有良好的溶解度。

Polyfluorene PFketal with ketal-eontaining side chain was synthesized by Suzuki polymerization, acid treatment of PFketal resulted in polymer PFOH which consists hydroxyl groups. The polymers were characterized by FT IR, X H-NMR, GPC, UV-Vis, PL and cyclic voltammogram（CV） measurements. Two polymers exhibit similar spectral properties, they both show maximum UV absorption peaks at 387 nm and maximum photoluminescence peaks at 424 nm. CV spectra indicate that PFOH shows relatively lower oxidation onset potential compared with PFketal. The solubility of polymers in polar solvents can be improved by incorporation of hydroxyl groups, PFOH is readily soluble in N, N- Dimethvlformamide （DMF） and Dimethvl sulfoxide （DMSO）. which are noor solvents for PFketal.