A DFT study of the ionization and electron attachment of 2-azido pyridine

The ionization process from the S0 to the D0+ state (D0 ← S0+ transition) of cis-2 azido pyridine requires an energy of 8.76 eV to take an electron from the HOMO of the S0 state to infinity, which is accompanied by a subsequent extensive reduction of electron density of the HOMO after ionization.