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本文研究了三苯胺(TPA)在不同溶剂中的时间分辨瞬态吸收光谱,测定了三苯胺在不同溶剂中的荧光寿命。讨论了瞬态吸收峰的归属。在正已烷和乙醇中,观察到了三苯胺的三重态瞬态吸收峰(λ_(max)=430nm)和三重态激基缔合物的瞬态吸收峰(λ_(max)=625nm)。在乙腈中,除观察TPA三重态和三重态激基缔合物的瞬态吸收外,还观测到TPA~+的瞬态吸收峰。根据实验结果,提出了TPA在不同极性溶剂中的光物理瞬态过程及其与溶剂相互作用的反应机理。
In this paper, we investigated the time-resolved transient absorption spectra of triphenylamine (TPA) in different solvents and determined the fluorescence lifetime of triphenylamine in different solvents. The assignment of transient absorption peaks is discussed. The transient absorption peak of triphenylamine (λ max = 430 nm) and the transient absorption peak of triplet excimer (λ max = 625 nm) were observed in n-hexane and ethanol. In acetonitrile, transient absorption of TPA ~ + was also observed in addition to the transient absorption of TPA triplet and triplet excimer. According to the experimental results, the photophysical transient processes of TPA in different polar solvents and their reaction mechanism with solvents were proposed.