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由咔唑衍生物基团与不同芳撑二烯基团交替共聚合成了系列发光共轭聚合物,探讨了此类聚合物的光诱导电荷转移性质.以荧光光谱为主要手段考察了此类聚合物与C60在苯溶液中的相互作用,发现其荧光猝灭行为符合所谓“作用球”模型.此猝灭过程与激发态能量在聚合物中的扩散过程有关,激发态能量扩散的有效范围即“作用球”范围.在此意义上求出的各聚合物“作用球”半径的大小顺序与聚合物激发态寿命有关.为了进一步研究聚合物激发态构型对其双分子猝灭行为的影响,我们还考察了对二氰基苯(DCB)对其中的两种聚合物荧光猝灭过程的温度效应,结果表明:聚合物激发态分子呈平面构型时有利于其与猝灭剂分子的有效碰撞,从而有利于进行能量(电荷)转移.
A series of light-emitting conjugated polymers were synthesized by alternating copolymerization of carbazole derivatives with different aromatic diene groups, and the photo-induced charge-transfer properties of these polymers were discussed. The fluorescence spectra were used to investigate the effects of such polymerization The interaction between C60 and benzene in benzene solution shows that its fluorescence quenching behavior is in accordance with the so-called “action sphere model.” The quenching process is related to the diffusion process of the excited state energy in the polymer. The effective range of the energy diffusion in the excited state is “Sphere of action.” The order of magnitude of the “sphere of action” for each polymer found in this sense is related to the lifetime of the excited state of the polymer.To further investigate the effect of the excited state of the polymer on its bimodal quenching behavior , We also investigated the temperature effect of dicyanobenzene (DCB) on the fluorescence quenching of two of these polymers. The results show that the excited state of the polymer in the planar configuration is favorable for its interaction with the quencher molecule Effective collision, which is conducive to energy (charge) transfer.