Reactions of OH and e aq - Adducts of Cytosine and Its Nucleosides or Nucleotides with Cu(II) Ions in Dilute Aqueous Solutions: A Steady-State and Pulse Radiolysis Study

1996 ◽  
Vol 146 (5) ◽  
pp. 514 ◽  
Author(s):  
K. Chabita ◽  
A. Saha ◽  
P. C. Mandal ◽  
S. N. Bhattacharyya ◽  
M. C. Rath ◽  
...  
Keyword(s):  
Steady State ◽  
Aqueous Solutions ◽  
Pulse Radiolysis ◽  
Dilute Aqueous Solutions

Steady state and pulse radiolysis studies of molybdenum octacyanate in aqueous solutions

1976 ◽  
Vol 80 (21) ◽  
pp. 2316-2320 ◽  
Author(s):  
M. Faraggi
Keyword(s):  
Steady State ◽  
Aqueous Solutions ◽  
Pulse Radiolysis

Temperature Effects on the Interactions between EHEC and SDS in Dilute Aqueous Solutions. Steady-State Fluorescence Quenching and Equilibrium Dialysis Investigations

Langmuir ◽  
1996 ◽  
Vol 12 (24) ◽  
pp. 5781-5789 ◽  
Author(s):  
Hans Evertsson ◽  
Stefan Nilsson ◽  
Christina Holmberg ◽  
Lars-Olof Sundelöf
Keyword(s):  
Steady State ◽  
Fluorescence Quenching ◽  
Aqueous Solutions ◽  
Temperature Effects ◽  
Equilibrium Dialysis ◽  
Steady State Fluorescence ◽  
Dilute Aqueous Solutions

Pulse radiolysis of nitric oxide in aqueous solution

1970 ◽  
Vol 48 (2) ◽  
pp. 393-394 ◽  
Author(s):  
W. A. Seddon ◽  
M. J. Young
Keyword(s):  
Nitric Oxide ◽  
Aqueous Solution ◽  
Steady State ◽  
Aqueous Solutions ◽  
Pulse Radiolysis ◽  
Hydrated Electron ◽  
Neutral Ph

Pulse radiolysis of aqueous solutions of nitric oxide at neutral pH shows that the reaction initiated by the hydrated electron, e−(aq), proceeds via NO− and a new transient thought to be (N2O2)−, and not HNO as indicated previously by steady state radiolysis.

Pulse radiolysis of aqueous solutions of N-Vinylpyrrolidin-2-one and Poly(N-vinylpyrrolidin-2-one)

1981 ◽  
Vol 34 (7) ◽  
pp. 1423 ◽  
Author(s):  
JE Davis ◽  
DF Sangster ◽  
E Senogles
Keyword(s):  
Aqueous Solutions ◽  
Hydroxyl Radical ◽  
Absorption Spectra ◽  
Rate Constant ◽  
Rate Constants ◽  
Pulse Radiolysis ◽  
Kinetic Method ◽  
Transient Species ◽  
Radical Scavengers ◽  
Dilute Aqueous Solutions

The absorption spectra of transient species produced when dilute aqueous solutions of N-vinylpyrrolidin-2-one (vp) and poly(N- vinylpyrrolidin-2-one) (pvp) are subjected to pulse radiolysis in the presence and absence of radical scavengers have been obtained and compared with those obtained from analogous compounds. The precise structure of the transients has not been established. Rate constants for the reaction of the hydroxyl radical with vp and pvp have been evaluated both by a competition kinetic method and by direct observation of the build-up of transient species: k(vp+·OH) = (6.4-8.1) × 109 dm3 mol-1 s-1 and k(pvp+·OH) = (1.5-2.3) × 108 dm3 mol-1 s-1 at 25°C. The rate constant for the reaction of the hydrated electron with vp has been determined as(1.6�0.3) × 109 dm3 mol-1 s-1 at 25°C. Rate constants for decay of the transient species have also been evaluated at 25°C: 2k(vp- OH·) = (8.1�1.0)× 108 dm3 mol-1 s-1; 2k(vp-e-) = (1.7�0.2) × 109 dm3 mol-1 s-1 and 2k(pvp-OH·) = (1.5�0.2) × 108 dm3 mol-1 s-1.

The radiolysis of aqueous solutions of oxybromine compounds; the spectra and reactions of BrO and BrO 2

1968 ◽  
Vol 304 (1479) ◽  
pp. 427-439 ◽  
Keyword(s):  
Aqueous Solution ◽  
Steady State ◽  
Aqueous Solutions ◽  
Absorption Spectra ◽  
Rate Constants ◽  
Pulse Radiolysis ◽  
Kinetic Spectroscopy

Pulse radiolysis supplemented by steady state radiolysis of aqueous solutions containing some of the following solutes: N 2 O, Br - , BrO - , BrO - 2 , BrO - 3 , CO 2- 3 , and OH - has been used to identify the absorption spectra of BrO ( λ max = 350 nm) and BrO 2 ( λ max = 475 nm) and to evaluate the following rate constants (units, M -1 s -1 ): e - aq. + BrO - → Br - + O - (2.3 ± 0.5 x 10 10 ); e - aq. + BrO - 2 → BrO + O 2- (1.8 ± 0.2 x 10 10 ); e - aq. + BrO - 3 → BrO 2 + O 2- (4.1 ± 0.2 x 10 9 ); OH + BrO - → OH - + BrO (4.5 x 10 9 ); O - + BrO - → BrO + O 2- (4.6 x 10 9 ); OH + BrO - 2 → OH - + BrO 2 (1.9 x 10 9 ); Br - 2 + BrO - → BrO + 2Br - (8.0 ± 0.7 x 10 7 ); Br - 2 + BrO - 2 → BrO + Br - + BrO - (8.0 ± 0.8 x 10 7 ); BrO + BrO - 2 → BrO - + BrO 2 (3.4 ± 0.7 x 10 8 ); 2BrO 2 ⇌ Br 2 O 4 ( k = 1.4 x 10 9 and K = 19 M -1 ); Br 2 O 4 + OH - → H + + BrO - 2 + BrO - 3 (7 x 10 8 ); 2BrO + H 2 O → BrO - + BrO - 2 + 2H + (4.9 ± 1.0 x10 9 ); CO - 3 + BrO - → CO 2- 3 + BrO (4.3 ± 0.4 x 10 7 ); CO - 3 + BrO - 2 → CO 2- 3 + BrO 2 (1.1 ± 0.1 x 10 8 ). In contrast to their chlorine analogues, little is known of the chemistry of the bromine oxides in aqueous solution. In this paper we describe the methods of formation and identification of the radicals BrO and BrO 2 , and their reactions with various oxybromine species, as elucidated by the techniques of pulse radiolysis and kinetic spectroscopy applied to aqueous solutions containing oxybromine anions.

Reactions of OH* and eaq − with uracil and thymine in the presence of Cu(II) ions in dilute aqueous solutions: A pulse radiolysis study

1996 ◽  
Vol 22 (3) ◽  
pp. 225-240 ◽  
Author(s):  
K. Chabita ◽  
A. Saha ◽  
P. C. Mandal ◽  
S. N. Bhattacharyya ◽  
M. C. Rath ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Pulse Radiolysis ◽  
Dilute Aqueous Solutions

The reactions of oligoalcohols with arsenic, arsenous, boric and germanic acids

1980 ◽  
Vol 45 (10) ◽  
pp. 2645-2655 ◽  
Author(s):  
Antonín Mikan ◽  
Miloš Bartušek
Keyword(s):  
Aqueous Solutions ◽  
Equilibrium Constants ◽  
Dilute Aqueous Solutions

The reactions of sorbitol, mannitol, adonitol, dulcitol, glucose and glycerol with H3AsO4, H3AsO3, H3BO3 and GeO2 acids in dilute aqueous solutions were studied by potentiometric neutralization titrations. The formation of the following chelates was demonstrated: As(V)L3-, As(III)L(OH)2-, HAs(III)L(OH)2, BL2-, GeL2(OH)- and GeL32- and the equilibrium constants for their formation were found. Conditions for formation of these chelates of organic oligohydroxy compounds are discussed.

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