Quenching by oxygen of excited states of dyes on cotton investigated with diffuse reflectance laser flash photolysis and singlet oxygen detection

2008 ◽  
Vol 114 (11) ◽  
pp. 327-332 ◽  
Author(s):  
L M G Jansen ◽  
I P Wilkes ◽  
D C Greenhill ◽  
F Wilkinson
Keyword(s):  
Singlet Oxygen ◽  
Excited States ◽  
Diffuse Reflectance ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Oxygen Detection ◽  
Quenching By Oxygen

Laser-flash-photolysis study of aliphatic thioketone triplets. Self-quenching and singlet-oxygen sensitization

1985 ◽  
Vol 81 (9) ◽  
pp. 1383 ◽  
Author(s):  
Kankan Bhattacharyya ◽  
Challa V. Kumar ◽  
Paritosh K. Das ◽  
B. Jayasree ◽  
Vaidhyanathan Ramamurthy
Keyword(s):  
Singlet Oxygen ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash

Reduction of hexaammineruthenium(III) ions by a series of tris(polypyridyl)chromium(II) ions – Revisiting the Cr(NN)33+/2+ self-exchange rate

2001 ◽  
Vol 79 (7) ◽  
pp. 1124-1127 ◽  
Author(s):  
K Omar Zahir
Keyword(s):  
Exchange Rate ◽  
Excited States ◽  
Rate Constants ◽  
Driving Force ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Outer Sphere ◽  
Laser Flash ◽  
Exchange Rate Constant ◽  
Kinetics Of

The kinetics of the outer-sphere oxidation of Cr(NN)32+ ions (NN = 2,2'-bipyridine, 1,10-phenanthroline, and their substituted analogs) by hexaammineruthenium(III) was studied using laser flash photolysis. The Cr(NN)32+ ions were generated via the reductive quenching of the *Cr(NN)33+ excited states by oxalate ions or by H2edta2–. The second-order rate constants were found to vary with the driving force of the reaction. The rate constants increase from (7.1 ± 0.5) × 106 M–1 s–1 for Cr(5-Clphen)32+ to (2.6 ± 0.2) × 108 M–1 s–1 for Cr(4,7-Me2phen)32+. The self-exchange rate constant for the couple (Cr(NN)33+/2+) was calculated by applying Marcus cross relation to present and other known reactions of Cr(NN)3n+ ions, where n = 3 or 2 with various reactants and is estimated to be (6 ± 4) × 107 M–1 s–1.Key words: tris(polypyridyl)chromium(II)/(III) self-exchange rate, hexaammineruthenium(III), oxidation of Cr(NN)32+.

Laser flash photolysis of dissolved aquatic humic material and the sensitized production of singlet oxygen

1987 ◽  
Vol 21 (6) ◽  
pp. 541-545 ◽  
Author(s):  
Fritz H. Frimmel ◽  
Herbert. Bauer ◽  
Joachim. Putzien ◽  
Patricia. Murasecco ◽  
Andre M. Braun
Keyword(s):  
Singlet Oxygen ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Humic Material
Sign in / Sign up

Export Citation Format

Share Document