Inverse correlation between efficiency of singlet oxygen production and rate constant for oxygen quenching in the S1 state of anthracene derivatives

2004 ◽  
Vol 6 (6) ◽  
pp. 1219 ◽  
Author(s):  
Fujio Tanaka ◽  
Tomoaki Furuta ◽  
Masami Okamoto ◽  
Satoshi Hirayama
Keyword(s):  
Singlet Oxygen ◽  
Rate Constant ◽  
Inverse Correlation ◽  
Oxygen Production ◽  
Oxygen Quenching ◽  
Anthracene Derivatives

Efficiencies of singlet oxygen production and rate constants for oxygen quenching in the S1state of dicyanonaphthalenes and related compounds

2008 ◽  
Vol 7 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Fujio Tanaka ◽  
Kazuyuki Tsumura ◽  
Tomoaki Furuta ◽  
Kenichi Iwamoto ◽  
Masami Okamoto
Keyword(s):  
Singlet Oxygen ◽  
Rate Constants ◽  
Oxygen Production ◽  
Oxygen Quenching ◽  
Related Compounds

scholarly journals Production and Reaction of Singlet Oxygen in Aqueous Micellar Solutions Using Pyrene as Photosensitizer

1978 ◽  
Vol 33 (6) ◽  
pp. 622-627 ◽  
Author(s):  
Norio Miyoshi ◽  
Giiti Tomita
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
Rate Constant ◽  
Oxidation Reaction ◽  
Sodium Dodecyl ◽  
Trimethylammonium Chloride ◽  
Micellar Solutions ◽  
Oxygen Production ◽  
Aqueous Micellar Solutions ◽  
Penetration Probability

Abstract The reaction of singlet oxygen with 1,3-diphenylisobenzofuran was investigated in aqueous micellar solutions of sodium dodecyl sulfate and dodecyl trimethylammonium chloride using pyrene as photosensitizer. Singlet oxygen, produced by the photosensitization of pyrene bound to micelles, oxidized efficiently 1,3-diphenylisobenzofuran bound to micelles. The quantum yield for singlet oxygen production and the rate constant for furan oxidation were determined by the kinetic analysis for the oxidation reaction of furan. Quenching of singlet oxygen by sodium azide competed with the furan oxidation, and its rate constant was also determined. Results obtained were compared with those in methanolic solutions. The quantum yield for singlet oxygen production and the rate constant for furan oxidation were much higher in micellar solutions than those in methanolic solutions. Empty micelles wxas found to act as a considerably strong scavenger for singlet oxygen. The penetration probability of singlet oxygen from aqueous phase into the interior of micelles which bound furan was also estimated

Oxygen quenching of the excited MLCT state of ruthenium (II) bipyridyl heteroleptic complexes and singlet oxygen thereby produced

2019 ◽  
Vol 36 (1) ◽  
pp. 242-251
Author(s):  
Karim El-Naggar ◽  
Hesham Abdel-Samad ◽  
Mohamed El-Khouly ◽  
Ayman Abdel-Shafi ◽  
Ramadan Ramadan
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Quenching ◽  
Heteroleptic Complexes ◽  
Mlct State

Formation of CT complexes and electron transfer from excited molecules of anthracene derivatives to methylviologen in aqueous and micellar media

1987 ◽  
Vol 52 (7) ◽  
pp. 1658-1665
Author(s):  
Viktor Řehák ◽  
Jana Boledovičová
Keyword(s):  
Electron Transfer ◽  
Complex Formation ◽  
Fluorescence Quenching ◽  
Rate Constant ◽  
Formation Constants ◽  
Dynamic Quenching ◽  
Micellar Media ◽  
Complex Formation Constants ◽  
Anthracene Derivatives ◽  
Ct Complexes

Disodium 1,5- and 1,8-anthracenedisulphonate (ADS) and 9-acetylanthracene form coloured CT complexes with methylviologen (MV2+) in aqueous and micellar media. The complex formation constants and molar absorptivities were determined by the Benesi-Hildebrandt method. In the fluorescence quenching, its static component plays the major role. The dynamic quenching component is determined by the rate constant of electron transfer from the S1 state of ADS to MV2+.

Sign in / Sign up

Export Citation Format

Share Document