We applied the two-color resonant two-photon ionization and mass-analyzed threshold ionization techniques to record the vibronic and cation spectra of 2,4-difluoroaniline. The cation spectra were recorded by ionizing via the 0 0, X 1, 6b 1, and 1 1 levels of the electronically excited S 1 state. Most of the observed active modes of this molecule in the S 1 and cationic ground D 0 states are related to the in-plane ring deformation vibrations. The band origin of the S 1 ← S 0 electronic excitation was found to appear at 33 294 ± 2 cm -1, whereas the adiabatic ionization energy was determined to be 63 935 ± 5 cm -1. Comparing the data of 2,4-difluoroaniline with those of aniline, 2-fluoroaniline, and 4-fluoroaniline, one can learn the effects of fluorine substitution on the electronic transition and molecular vibration.
|Number of pages||4|
|Journal||Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy|
|Publication status||Published - 2012 Jul 1|
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics