UV-Visible Activation of Biomolecular Ions
Excited levels involved in photoexcitation of molecular ions depend on the wavelength of the light. Infrared photons correspond to vibrational excitation and lead to a global heating of ions and fragmentation on the ground state potential energy surface. In this chapter, we will discuss visible and UV excitations that occur in biomolecular ions. Visible and UV photons correspond to electronic excitations of valence electron. At higher energy photons, core-shell electron excitation is possible.