Ultrafast excited-state dynamics of aminoperylene and of its protonated form observed by femtosecond absorption spectroscopy

作者：Mohammed Omar F; Vauthey Eric^*

来源：Chemical Physics Letters, 2010, 487(4-6): 246-250.

DOI：10.1016/j.cplett.2010.01.066

The photophysics of aminoperylene (APe) in various solvents, including a room-temperature ionic liquid, has been investigated by steady-state and femtosecond transient absorption spectroscopies. The ultrafast excited-state dynamics originates from the solvation of the polar S(1) state and not from a transition from a locally-excited to a charge-transfer state, as found with perylene-dimethylaniline. Addition of acid yields the protonated form APeH(+), which exhibits similar photophysical properties than perylene, due to the suppression of the charge-transfer character of the S(0)-S(1) transition. However, excited-state proton transfer, resulting to the formation of APe in the S(1) state, is observed in methanol.

• 出版日期2010-3-5