The first publication published in 2017  is a study about the photophysical identity of the lowest excited singlet states for three different fluoroindoles. We could show that the orientation of the transition dipole moment for substituted indoles is not a reasonable identifier for the nature of the excited state – L_a or L_b – in general, although the assignment is often based on this data. More information about these two states and why they are important can be found here.