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本文测定了芘(Py)-三苯胺(TPA)、芘(Py)-N,N- 二苄基苯胺(DBA),芘(Py)- 二苯胺(DPA)体系的时间分辨瞬态吸收光谱。在非极性溶剂中,直接观察到了Py与TPA,Py与DBA形成的激基复合物瞬态吸收;在极性溶剂中,观察到了Py~-,TPA~+以及DPA~+的瞬态吸收光谱。对所研究的体系,提出了不同极性溶剂中芳胺猝灭Py的激发单重态机制。
In this paper, the time-resolved transient absorption spectra of pyrene (TPA), pyrene (Py) -N, DBA and DP-DPA were determined. In apolar solvents, the transient absorption of the exciplex formed by Py and TPA, Py and DBA was directly observed. The transient absorption of Py ~ -, TPA ~ + and DPA ~ + were observed in polar solvents spectrum. For the system studied, we proposed the quenching mechanism of pyrene excited by aromatic amines in different polar solvents.