Single and multiple photon ionization of triethylamine

Single and multiple photon ionization photoelectron spectroscopy of triethylamine (TEA) was studied using a newly developed high-resolution electron spectrometer which utilizes position sensitive detection. The adiabatic ionization potential of TEA was accurately determined using both single (7.47±0.04 eV) and multiphoton (7.53±0.10 eV) ionization photoelectron spectroscopy. Although excitation to both the S1 and S2 states can occur, multiphoton ionization always occurs out of the S1 state. When the cation dissociates, the distribution of photoelectron energies similarly reflects this partitioning between S1 and S2. copyright 1996 American Institute of Physics