Radiolysis of aqueous solutions containing nitrite ions and nitrous oxide

1965 ◽  
Vol 61 ◽  
pp. 715 ◽  
Author(s):  
F. S. Dainton ◽  
S. R. Logan
Keyword(s):  
Nitrous Oxide ◽  
Aqueous Solutions

On the Radiolysis of Alkali Halides in Aqueous Solutions Saturated with Nitrous Oxide

1964 ◽  
Vol 68 (10) ◽  
pp. 2967-2970 ◽  
Author(s):  
M. Anbar ◽  
D. Meyerstein ◽  
P. Neta
Keyword(s):  
Nitrous Oxide ◽  
Aqueous Solutions ◽  
Alkali Halides

The photochemistry of aqueous solutions of Fe(II) II. Processes in acidified solutions of potassium ferrocyanide at 25°C

1966 ◽  
Vol 291 (1427) ◽  
pp. 478-486 ◽  
Keyword(s):  
Nitrous Oxide ◽  
Quantum Yield ◽  
Aqueous Solutions ◽  
Potassium Ferrocyanide ◽  
Geminate Recombination ◽  
Nitrate Ions ◽  
Decreasing Ph

Yields of hydrogen and nitrogen have been measured for acidified solutions of potassium ferrocyanide containing nitrous oxide illuminated with 2537 Å light. From the effect of decreasing pH and added nitrate ions which diminish ϕ (N 2 ) and the effect of isopropanol which acts as an H atom scavenger it is concluded that (i) k ( e ¯ aq. + HFe(CN) 3– 6 ) / k ( e ¯ aq . + N 2 O) = 0·25 ± 0·1 at μ = 0 and increases with increasing μ ; (ii) k (H + NO ¯ 3 ) / k (H + (CH 3 ) 4 CHOH) = 0·47 ± 0·05; (iii) k (H + Fe(CN) 3– 6 ) / k (H + (CH 3 ) 2 CHOH) = 72 ± 7 and is independent of μ ; (iv) the protonated ferrocyanide ion, HFe(CN) 3– 6 absorbs 2537 Å light and undergoes decomposition according to either ( a ) HFe(CN) 3– 6 + hv → H + + Fe(CN) 3– 6 + e ¯ aq. or (b) HFe(CN) 3– 6 + hv → H + Fe(CN) 3– 6 which is opposed by geminate recombination and such that ϕ a + ϕ b < 0·66, the quantum yield of Fe(CN) 4– 6 + hv → Fe(CN) 3– 6 + e ¯ aq. . The implications of these results are discussed.

The radiation chemistry of aqueous solutions of nitrous oxide

1965 ◽  
Vol 285 (1402) ◽  
pp. 339-359 ◽  
Keyword(s):  
Nitrous Oxide ◽  
Steady State ◽  
Aqueous Solutions ◽  
Dose Rate ◽  
Radiation Chemistry ◽  
Bimolecular Reaction ◽  
Unimolecular Decomposition ◽  
Solvated Electron ◽  
Concentrated Aqueous Solutions ◽  
Dose Effects

For carefully purified concentrated aqueous solutions of N 2 0, G (N 2 ) is initially greater than the steady state value of 3.0 and G (O 2 ) less than the steady state value of 1.45 when G (H 2 ) = G (H 2 O 2 ) = 0. For very dilute solutions G (N 2 ) is small, independent of dose rate and decreases with increasing dose and decreasing [N 2 O], while G (H 2 ) is initially > 0.45, independent of dose rate and decreases with dose. The high initial G (H 2 is not due to organic or other impurity and is thought to arise either from bimolecular reaction of e aq − . and H within a spur or track or from unimolecular decomposition of the solvated electron either to H 2 + O - or H + OH - or from a combination of both. The dose effects are attributed to competitive scavenging of e aq − . by H 2 O 2 as the latter is produced.

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