Ionising radiations, employed in a broad range of dose-rate, together with a complex non-linear computation of reaction mechanisms, allow the determination of boundary values of rate constants concerning sorbitylfurfural (SF) reactivity towards a wide series of oxidant and/or virtually harmful radicals. SF reacts with some radicals (H, SO4-., CO3-., Br-2(-.), CH3.), produced with both pulse and stationary radiolysis in neutral aqueous solution, having electrophilic and/or oxidative behaviour. The rate constants range from diffusional (k = (7-9) x 10(9) M-1 s(-1)) to relatively low values (k = 2 x 10(5) M-1 s(-1)). The possibility to observe these reactions, by means of radiolytical techniques. is heavily influenced by dose-rate. A relation between the radical E-NHE(0) and their reactivity with SF is hinted.
The antioxidant reactivity of Sorbitylfurfural towards potential harmful radicals, studied by radiation chemistry techniques
M D'Angelantonio;
2004
Abstract
Ionising radiations, employed in a broad range of dose-rate, together with a complex non-linear computation of reaction mechanisms, allow the determination of boundary values of rate constants concerning sorbitylfurfural (SF) reactivity towards a wide series of oxidant and/or virtually harmful radicals. SF reacts with some radicals (H, SO4-., CO3-., Br-2(-.), CH3.), produced with both pulse and stationary radiolysis in neutral aqueous solution, having electrophilic and/or oxidative behaviour. The rate constants range from diffusional (k = (7-9) x 10(9) M-1 s(-1)) to relatively low values (k = 2 x 10(5) M-1 s(-1)). The possibility to observe these reactions, by means of radiolytical techniques. is heavily influenced by dose-rate. A relation between the radical E-NHE(0) and their reactivity with SF is hinted.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
