Photodissociation of Charge Transfer Complexes based on Aromatic Amines and Bromine-containing Electron Acceptors

Ionic photodissociation of Am·HBMS donor-acceptor complexes leads to the formation of a primary coloured product that is a diphenylmethane dye and acid H⁺[S(O)₂CBr₃]^- if Am is diphenylamine, or N,N-diphenylphenylmethyleneiminium bromide and acid H ⁺ [CBr₂=S(O)₂—CBr₃]^- if Am is diphenylbenzylamine [hexabromodimethylsulfone (HBMS) is the electron acceptor]; the structure of the amine determines the difference in the coloured products.