Аннотация:The review deals with lasers utilizing multicomponent dye solutions and photochemical lasers (PCL) employing fast reactions of phototransfer of a proton in organic compounds. An influence is analyzed of the fast reversible photochemical reactions and electron energy transfer on broadening of the spectral range of dye laser radiation tuning. Criteria are formulated for the choice of acid-base systems used in active media (AM) of the PCL and donor-acceptor systems for the AM of energy-transfer lasers. The spectral characteristics of the PCL AM and binary dye mixtures for energy-transfer lasers are given.