Physical Mechanisms of Activation of Radical Reactions in Aqueous Solutions under Mechanical and Magnetic Effect: Problem of Singlet Oxygen

Physical mechanisms of both classical and quantum nature, which can in principle activate biochemical kinetics of solutions, are discussed. The generation of hydrogen peroxide (H2O2) molecules under external effects on an aqueous solution containing molecular oxygen О2 is analyzed as an example. The possibility of enriching an aqueous solution with hydrogen peroxide without participation of oxygen is also discussed. External effects of different physical types—mechanical (vibrational), magnetic, and thermal—are considered and compared. Possible influence of hydrodynamic vortices arising during vibrations on the spin states of oxygen molecules is suggested and theoretically substantiated.