Fluorescence Quenching by Oxygen. Lack of Evidence for the Complex Formation of Oxygen with 9-Cyanoanthracene and Anthracene in a Supersonic Free Jet

1997 ◽  
Vol 101 (7) ◽  
pp. 1292-1298 ◽  
Author(s):  
Urs Graf ◽  
Hiromichi Niikura ◽  
Satoshi Hirayama
Keyword(s):  
Complex Formation ◽  
Fluorescence Quenching ◽  
Free Jet ◽  
Quenching By Oxygen

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+.

Chlorophyll fluorescence quenching by oxygen in plants

1981 ◽  
Vol 59 (2) ◽  
pp. 190-198 ◽  
Author(s):  
William Vidaver ◽  
Konrad Colbow ◽  
Gordon Hall ◽  
Silvia Wessel
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Yield ◽  
Reaction Centers ◽  
Variable Fluorescence ◽  
Chlorophyll Fluorescence Quenching ◽  
Sensitive Phase ◽  
Feedback Regulator ◽  
Quenching By Oxygen ◽  
Bean Leaves

Three distinct phases of chlorophyll a fluorescence quenching were observed in green plants by applying O2 pressures of up to 400 atm. These phases are interpreted as indications of three different mechanisms of O2 quenching. The most sensitive phase is dependent on intersystem electron transport. For dark-adapted bean leaves this fluorescence was quenched to half the initial yield with an O2 pressure of about 3 atm. The second mechanism was observed with 3-(3,4)dichlorophenyl)-1,1-dimethylurea (DCMU), namely the quenching of variable fluorescence in leaves, chloroplasts, and green algae cells. This effect of O2 is thought to be closely associated with the photochemical system II reaction centers. Half of the variable fluorescence was quenched with about 40 atm of O2. Finally, the antennae pigments are quenched, as observed by the effect of O2 on the O-level fluorescence yield, when all photochemical system II reaction center traps are presumably open. The O2 pressure required for half-quenching in this case was about 400 atm.The possibility that the quenching of fluorescence occurs with O2 concentrations low enough for endogenous O2 to have an effect on in vivo fluorescence was investigated. We suggest that O2 quenches by competing with photochemical system I for electrons derived from water splitting, and may thus function as a feedback regulator of photosynthesis.

Use of solid carbon dioxide to alleviate fluorescence quenching by oxygen

1990 ◽  
Vol 62 (23) ◽  
pp. 2654-2656 ◽  
Author(s):  
Sadao. Matsuzawa ◽  
Akihiro. Wakisaka ◽  
Mitsuhisa. Tamura
Keyword(s):  
Carbon Dioxide ◽  
Fluorescence Quenching ◽  
Solid Carbon ◽  
Solid Carbon Dioxide ◽  
Quenching By Oxygen

Fluorescence Quenching by Oxygen: “Debunking” a Classic Rule

ChemPhysChem ◽  
2010 ◽  
Vol 11 (4) ◽  
pp. 796-798 ◽  
Author(s):  
Franco M. Cabrerizo ◽  
Jacob Arnbjerg ◽  
M. Paula Denofrio ◽  
Rosa Erra-Balsells ◽  
Peter R. Ogilby
Keyword(s):  
Fluorescence Quenching ◽  
Quenching By Oxygen

Chlorophyll Fluorescence Quenching by Oxygen in Maize Mesophyll and Bundle Sheath Cells

1987 ◽  
Vol 127 (1-2) ◽  
pp. 67-76 ◽  
Author(s):  
Radovan Popovic ◽  
Saravanamuthu Maheswaran ◽  
William Vidaver ◽  
Konrad Colbow
Keyword(s):  
Chlorophyll Fluorescence ◽  
Fluorescence Quenching ◽  
Bundle Sheath ◽  
Chlorophyll Fluorescence Quenching ◽  
Bundle Sheath Cells ◽  
Quenching By Oxygen ◽  
Sheath Cells

scholarly journals Carbazole-Acenaphthene (Donor-Acceptor) based luminophores for picric acid detection: a combined experimental and theoretical study

2021 ◽  
Author(s):  
Aravind Kajjam ◽  
Kasturi Singh ◽  
Varun Tej R V ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Complex Formation ◽  
Fluorescence Quenching ◽  
Theoretical Study ◽  
Picric Acid ◽  
Donor Acceptor

In the present investigation, carbazole-Acenaphthene based Donor-Acceptor luminophores were designed and synthesized. All the luminophores were showing fluorescence quenching behavior towards nitroaromatics through complex formation. All the luminophores were used...

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