Ways of deactivation of the electron excitation energy of arylethylenes and arylpolyenes in solutions

Experimentally and quantum chemical calculations have established that the main ways of deactivation of the electron excitation energy for 4,4′-substituted AE with electronic acceptor derivatives are, along with trans–sic and isomerization, the transition of an electron from a singlet excited state to the ground state with fluorescent radiation. For molecules with electrodonor substituents, an intercombination S-T electron transition occurs with the observation of phosphorescent radiation. It was found that an increase in the number of ethylene bonds in the structure of aryl-polyene processes without radiative internal conversion deactivation of energy.