Dopamine: effect of concentration and pH on the electron emission. Reaction mechanisms

Dopamine: effect of concentration and pH on the electron emission. Reaction mechanisms

Dopamine (DA) in airfree, aqueous solution (pH 7.4; 37°C) is able to emit e(-)(aq) when electronically excited in its singlet state by monochromatic UV light (λ=254 nm; 4.85 eV/hν). The quantum yield Q(e(-)(aq)), was studied in dependence of DA concentration and pH of the media. The DA transients re...

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Veröffentlicht in:In vivo (Athens) 2012-01, Vol.26 (1), p.107-111
Hauptverfasser: Getoff, Nikola, Brenn, Eric, Ying, Shaobin
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Dopamine - chemistry
Electrons
Hydrogen-Ion Concentration
Models, Chemical
Molecular Structure
Oxidation-Reduction - radiation effects
Photolysis - radiation effects
Quantum Theory
Solutions - chemistry
Ultraviolet Rays
Water - chemistry
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Zusammenfassung:Dopamine (DA) in airfree, aqueous solution (pH 7.4; 37°C) is able to emit e(-)(aq) when electronically excited in its singlet state by monochromatic UV light (λ=254 nm; 4.85 eV/hν). The quantum yield Q(e(-)(aq)), was studied in dependence of DA concentration and pH of the media. The DA transients resulting from the electron emission form products, which also have the ability to emit e(-)(aq), but with much lower yield. Since DA in the ground state can consume e(-)(aq), it is classified as an electron mediator. Some biological consequences based on the e(-)(aq) emission are mentioned.
ISSN:1791-7549