Formation of Hydroxyl Radical from the Photolysis of Salicylic Acid
Citations Over Time
Abstract
Photodissociation dynamics of salicylic acid (SA) in the gas phase at different photolysis wavelengths (266, 315-317 nm) is investigated by probing the nascent OH photoproduct employing the single-photon laser-induced fluorescence (LIF) technique. At all the photolysis wavelengths it is found that the nascent OH radicals are produced mostly in a vibrationally ground state (υ'' = 0) and have similar rotational state distributions. The two spin-orbit and Λ-doublet states of the OH fragment formed in the dissociation are measured to have a nonstatistical distribution at each photolysis wavelength. The LIF signal of the OH could be observed upon photolysis at 317 nm but not at 317.5 nm. The threshold of OH formation from SA photodissociation is estimated to be 98.2 ± 0.9 kcal/mol. The effect of the phenolic OH group on the dissociation of SA is discussed.
Related Papers
- → Threshold and cage effect for photodissociation of H2O in solid Ne and Ar(1995)16 cited
- → Hydroxyl radical scavenging activity of salicylic acid and its hydroxylated metabolites. An ESR study(1992)9 cited
- → Molecular dynamics simulations of reactions in solids: Photodissociation of Cl2 in crystalline Xe(1989)55 cited
- → Molecular dynamics simulation of O3 photolysis by ultraviolet light in solid argon(1999)