芴酮对聚醚侧链聚芴体系的影响：合成，表征及光物理性质的研究

Effect of Fluorenone on the Polyfluorenes with Polar Tri(ethylene oxide) Side Chains and Their Synthesis,Characterization and Photophysics

利用Yamamoto聚合反应,通过调节单体2,7-二溴9,9'-二-(三乙氧基甲基)芴和2,7-二溴芴酮的比例,合成了侧链为极性聚醚链,芴酮含量逐渐增加的聚芴系列.通过聚合物溶液及固态薄膜的紫外荧光谱图,深入研究芴酮作为能量受体的能量转移过程及其对聚合物光物理性质的影响.结果表明:稀溶液中体系呈现聚芴本征态的荧光发射,能量转移对溶液浓度具有依赖性;固态薄膜中能量转移效率随芴酮含量的增加而快速增长,退火后这种现象更加明显。

A series of fluorene-fluorenone copolymers constituted by 9,9-di（3,6,9-trioxadecyl）-fluorene and 9-fluorenone moieties in different molar ratios have been synthesized by Yamamoto coupling reactions. By means of the UV-Vis and PL emission spectra of solution and solid state film, the effect of fluorenone acting as an energy acceptor on the energy transfer process and the photophysics of the copolymers was investi- gated. In dilute solution, the fluorescence of the polyfluorene backbone was dominant and the energy transfer depended on the polymer concentration strongly. The energy transfer efficiency of the thin film was enhanced rapidly with increasing the fluorenone content and the phenomenon became more distinct after being annealed.