Behavior of carbon trioxide (-) radicals generated in the flash photolysis of carbonatoamine complexes of cobalt(III) in aqueous solution

1973 ◽  
Vol 77 (9) ◽  
pp. 1111-1116 ◽  
Author(s):  
Schoen-Nan Chen ◽  
Virgil W. Cope ◽  
Morton Z. Hoffman
Keyword(s):  
Aqueous Solution ◽  
Flash Photolysis

Flash photolysis and pulse radiolysis of the Co(sep)3+-X- (sep = sepulchrate; X = I, Br) systems in aqueous solution

1986 ◽  
Vol 25 (23) ◽  
pp. 4249-4252 ◽  
Author(s):  
Fernando Pina ◽  
Mauro Maestri ◽  
Roberto Ballardini ◽  
Quinto G. Mulazzani ◽  
Mila D'Angelantonio ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Pulse Radiolysis ◽  
Flash Photolysis

Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine

1996 ◽  
Vol 1 (2) ◽  
Author(s):  
Te-Fu L. Ho ◽  
James R. Bolton ◽  
Ewa Lipczynska-Kochany
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Quantum Yield ◽  
High Performance ◽  
Flash Photolysis ◽  
Quantum Yields ◽  
Visible Absorption ◽  
Dilute Aqueous Solution ◽  
Uv Visible ◽  
Photolysis Of Phenol

AbstractA broadband method has been applied to determine the quantum yields for the photochemical removal of three common pollutants: phenol, 4-chlorophenol and N-nitrosodimethylamine (NDMA) in dilute aqueous solution. Flash photolysis (xenon flash lamps) was used to cause a significant amount of photolysis without photolyzing intermediates. The analysis of reactant depletion following a single flash was carried out by high- performance liquid chromatography (HPLC) or UV/visible absorption spectroscopy. The method for determining quantum-yields employed p-benzoquinone as an actinometer and was validated by determining the average (200-400 nm) quantum yield for the generation of hydroxyl radicals from the photolysis of hydrogen peroxide (0.90 ± 0.10) and the quantum yields for the photolysis of phenol (0.13 ± 0.02) and 4-chlorophenol (0.24 ± 0.04). The values determined agree very well with the literature ones obtained with monochromatic radiation. The quantum yield for the direct photolysis of NDMA was found to be 0.11 ± 0.03 at neutral pH and 0.27 ± 0.02 at pH 2-4. Under conditions where hydrogen peroxide is the principal absorber, the NDMA quantum yield is 0.32 ± 0.04, independent of pH in the range 2-8.

Ionizing Irradiation Property of L(+)-Alpha-Phenylglycine in Acid Aqueous Solution

2011 ◽  
Vol 343-344 ◽  
pp. 469-475
Author(s):  
Wen Yan Shi ◽  
Jian Zhong Gu ◽  
Zheng Jiao ◽  
Wen Jing Wu ◽  
Gang Xu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Steady State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Transient Species ◽  
Ionizing Irradiation ◽  
Steady State Analysis ◽  
Applied Dose ◽  
Acid Aqueous Solution

(+)-alpha-phenylglycine are significant contaminants at pharmaceutical intermediates production. To study processes for the destruction of contaminant L(+)-alpha-phenylglycine in acid aqueous solution we have investigated the transient species using both laser flash photolysis. The OH· reaction with L(+)-alpha-phenylglycine process was investigated and formed polymer. Furthermore, the results of steady-state analysis suggested that L(+)-alpha-phenylglycine removal was found to be more efficient with increasing applied dose. L(+)-alpha-phenylglycine, decreased by 44.50%, using a dose of 14kGy.

FLASH PHOTOLYSIS OF 3-IODOTYROSINE IN AQUEOUS SOLUTION AT pH 5

1978 ◽  
Vol 28 (2) ◽  
pp. 185-190 ◽  
Author(s):  
M. Arvis ◽  
I. Kraljić ◽  
J. P. Girma ◽  
J. L. Morgat
Keyword(s):  
Aqueous Solution ◽  
Flash Photolysis
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