Reactions of NO anion radical with electron acceptors

3 REACTIONS OF NO - ANION RADICAL WITH ELECTRON ACCEPTORS 

In the radiolysis of water-alkaline glasses containing nitrate ion, NO , the anion radical NO - is formed. This possesses strong electron-donor 

Despite the dependence of the reaction rate on temperature, the tunneling mechanism of electron transfer from NO3- to CrO and Co(en)3 at 77 K appears to be the most probable one since, in water- alkaline glasses at 77 K, the diffusional motion, even for et which most likely possess a higher mobility than NOg, cannot provide the necessary reaction rate (see Chap. 6)  

Thus in the radiolysis of water-alkaline matrices containing N03 and CrO simultaneously, electrons are first captured by both acceptors and then there occurs an electron tunneling from the formed NOg anion radical to CrO . In the radiolysis of the same matrices containing both N03 and Co(en)3 +, the electrons which have been captured initially by the ion Co(en)3 f further tunnel from the formed long-lived excited particles 

A similar shuttle mechanism of electron scavenging was also suggested [81 for the reaction of a hydrated electron, eaq, with p-nitrobenzoatopen-taamine Co(III), 

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