Journal ArticleDOI
Re-evaluation of the thiocyanate dosimeter for pulse radiolysis
George V. Buxton,Craig R. Stuart +1 more
TLDR
In this article, the super-Fricke dosimeter was used as a secondary standard for the thiocyanate dosimeter in O2-saturated water and the results were improved to 3.47 ± 0.06.Abstract:
The thiocyanate dosimeter (10–2 mol dm–3 SCN– in O2-saturated water) has been standardised against the super-Fricke dosimeter (10–2 mol dm–3 FeII in O2-saturated 0.4 mol dm–3 H2SO4) using the hexacyanoferrate(II) dosimeter [5 × 10–3 mol dm–3 Fe(CN)64– in O2-saturated water] as a secondary standard. On the basis that G(FeIII)= 1.67 × 10–6 mol J–1 and IµFeIII= 220.4 m2 mol–1 at 304 nm and 25 °C in the super-Fricke dosimeter, we obtain GIµ[Fe(CN)63–]=(3.47 ± 0.06)× 10–5 m2 J–1 at 420 nm and GIµ(SCN)2˙–=(2.59 ± 0.05)× 10–4 m2 J–1 at 475 nm. These values remain unchanged when the solutions are saturated with air instead of O2 and are doubled in N2O-saturated solution.read more
Citations
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Journal ArticleDOI
Toluene nitration in irradiated nitric acid and nitrite solutions
TL;DR: In this paper, aryl alkyl mild ortho-para director -toluene, in irradiated nitric acid and neutral nitrite solutions were investigated using?, and pulse radiolysis.
Journal ArticleDOI
Mechanisms of reactions of .no with complexes with metal-carbon sigma -bonds and with aliphatic radicals
TL;DR: It is concluded that the mechanism of the decomposition of these transients in the presence of(*)NO involves the reaction of (*)NO with the carbon-centered radicals as well as with the transient with the metal-carbon sigma-bonds to form the same products.
Journal ArticleDOI
Mechanism of (SCN)2·- Formation and Decay in Neutral and Basic KSCN Solution under Irradiation from a Pico- to Microsecond Range.
TL;DR: The detailed mechanism of the reaction between SCN- and the OH∙ radical and the formation of the dimer radical (SCN)2∙- are studied by picosecond pulse radiolysis and the absorption spectrum of the radical SCN∙ is determined and is found to be different than that reported previously.
Book ChapterDOI
Competition Kinetics: An Experimental Approach
TL;DR: In this chapter, free radical kinetics with the help of competition kinetics and some experimental results calculated to find out the rate constant of reactive species with target compound, which is used by radiation chemists is discussed.
Journal ArticleDOI
A pulse--radiolysis approach to fast reductive cleavage of a disulfide bond to uncage enzyme activity.
Lilia Milanesi,Salvador Tomas,Christopher A. Hunter,Julia A. Weinstein,Ruth Edge,Suppiah Navaratnam,Jonathan P. Waltho,Jonathan Best +7 more
TL;DR: It is shown that up to 10% of the enzyme activity can be restored by reductive pulse radiolysis, consistent with the radiolytically restored activity of the caged papain quantified by the biochemical assay.
References
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Journal ArticleDOI
Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution
TL;DR: In this article, the rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes, and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods.
Journal Article
Critical review of rate condtants for reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals in aqueous solution
Journal ArticleDOI
Yield for the scavenging of hydroxyl radicals in the radiolysis of nitrous oxide-saturated aqueous solutions
TL;DR: In this article, the thiocyanate dosimeter was calibrated against the Fricke system to obtain a value of 46,400 +-600 (molecules/100 eV) for the product of yield and extinction coefficient of (SCN)/sub 2/O-saturated solutions.
Journal ArticleDOI
Track effects in radiation chemistry. Concentration dependence for the scavenging of hydroxyl by ferrocyanide in nitrous oxide-saturated aqueous solutions
TL;DR: In this paper, the radiation chemical yield for oxidation of ferrocyanide by OH produced in the fast electron radiolysis of N/sub 2/O-saturated aqueous solutions was found to increase from a low concentration limiting yield of 5.2 to values in excess of 6.7.