Measurements of the Stark effect on the rotationally resolved S1←S0 fluorescence excitation spectrum of aniline are reported, providing quantitative information about the degree of charge transfer in the electronic transition. We find that μa(S1 = 2.801 ± 0.007 D, a value that is ∼150% larger than the ground state, μa(S0) = 1.129 ± 0.005 D. The enhanced value of the dipole moment in the S1 state is attributed to more efficient electron donation by the quasi-planar amino group to the aromatic ring.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the American Chemical Society|
|State||Published - Jan 10 2001|
ASJC Scopus subject areas
- Colloid and Surface Chemistry