The kinetics of the reactions of 9-aryloxy-1,10-anthraquinone derivatives with aliphatic and aromatic amines was studied. The limiting stage of the reaction is the nucleophilic 1,4-addition. Electron withdrawing substituents in anthraquinone increase and electron donor substituents considerably decrease the rate constant, stabilizing photoinduced 1,10-anthraquinones. The geometric and electronic structures of the amine also affect the rate constant. On going from alkylamines to aniline, the rate constant decreases by more than an order of magnitude. The introduction of electron donor substituents into the aniline molecule leads to an increase in the rate constant, while the introduction of electron withdrawing substituents leads to its decrease. The significant negative activation entropy of the reaction between 1,10-anthraquinone derivatives andn-propylamine leads one to the conclusion that the transition state is highly ordered. The reaction occurs easily due to the low activation enthalpy (?H# = 2÷7 kcal mol-1).