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利用吸收光谱和皮秒时间分辨荧光研究PAN C60 星状共聚物的电荷转移过程。PAN C60 共聚物的吸收和荧光光谱结果显示共聚物中存在着电荷转移过程。时间分辨荧光结果表明PAN的荧光衰减遵循双指数衰减规律 (一快过程 16 0 ps和一慢过程 15 0 0 ps) ,快衰减过程主要来源于聚合物中主链间相互作用产生的空间间接极化子对的影响 ,慢变过程主要来源于单重态激子的辐射跃迁弛豫。在共聚物中 ,C60 分子的存在除导致PAN激发态寿命缩短外 ,还影响聚合物链间的相互作用 ,C60 分子对PAN荧光猝灭作用主要通过慢变过程影响的 ,而对PAN的空间极化子对的影响主要与其快衰减过程有关
The charge transfer of PAN C60 stellate copolymer was studied by absorption spectra and picosecond time-resolved fluorescence. The absorption and fluorescence spectra of PAN C60 copolymer show that there is a charge transfer process in the copolymer. The time-resolved fluorescence results showed that the fluorescence decay of PAN followed the double exponential decay law (a fast process of 160 ps and a slow process of 150 ps), and the fast decay process mainly came from the spatial indirect polarities generated by the main chain interactions in the polymer The influence of the sonon pair, the slow change process mainly comes from the relaxation of the singlet exciton radiation transition. In the copolymer, the presence of C60 molecules not only shortens the lifetime of PAN excited states, but also affects the interaction between polymer chains. The quenching effect of C60 molecules on PAN fluorescence mainly through slow process, The influence of the sonon pair is mainly related to its fast decay process