Optical spectrum of proflavine and its ions

▶ The visible line in the optical spectrum of proflavine in vacuum is at 4078.42 A. ▶ The visible line of the anion is at 4305.00 A. ▶ The visible line of the cation is at 4217.15 A. ▶ The visible line of the dication is at 4232.08 A. ▶ Typical UV lines are also calculated.