Magnetic field effects on the photodissociation reaction of triphenylphosphine in non-viscous homogeneous solutions

Magnetic field effects on the photodissociation reaction of triphenylphosphine at 293 K were investigated in several non-viscous homogeneous solvents by means of a nanosecond laser photolysis technique under magnetic fields of 0–1.75 T. The generated neutral radical 3air of the diphenylphosphinyl and phenyl radicals showed clear magnetic field effects. The yield of the escaped diphenylphosphinyl radical at 1.5 T reduced to 74% ± 3% of that at 0 T in 2-propanol (η = 2.379 at 293 K. Similar magnetic field effects were observed at 293 K even in more fluid solvents such as n-hexane (84% ± 5% at 1.5 T), cyclohexane (65% ± 2% at 1.5 T), and p-dioxane (64% ± 3% at 1.5 T).