摘要
The transient absorption spectra of triphenylamine (TPA) in various solvents have beeninvestigated by the methods of nanosecond laser photolysis. The lifetimes of TPA were meas-ured. In hexane and ethanol, the transient absorptions of triplet state and triplet excimer ofTPA were observed. However, the transient absorptions of the TPA cation radical was alsoobserved in acetonitrile besides that of the triplet TPA monomer and excimer. According tothe experimental facts, the transient photophysical mechanism of TPA in various solvents hasbeen proposed.
The transient absorption spectra of triphenylamine (TPA) in various solvents have been
investigated by the methods of nanosecond laser photolysis. The lifetimes of TPA were meas-
ured. In hexane and ethanol, the transient absorptions of triplet state and triplet excimer of
TPA were observed. However, the transient absorptions of the TPA cation radical was also
observed in acetonitrile besides that of the triplet TPA monomer and excimer. According to
the experimental facts, the transient photophysical mechanism of TPA in various solvents has
been proposed.
基金
Project supported by the National Natural Science Foundation of China and the Applied Organic Chemistry Laboratory, Lanzhou University.
