Also the nature has developed some light emitting rections
: One of the best known phenomena is the oxidation of Luciferins from the firefly.
With a solution of luminol in dimethyl sulfoxide, the formation of the light of
bioluminescence can be simulated, which can be observed by stimulation of dinoflagellates in
the sea by the action of oxygen caused by ships.
A practical use could be found for emergency lights (in household, in the mountains, on sea and
for diving), detection of oxygen on dangerous places, or in microbiological experiments
(showing an anaerobic environment). .
The description of an experiment with
Luminol can be found here
Lucigenin, a Dimethyl-diacridiniumsalt, shows in alkaline peroxide solution a strong
luminescence. Both, lucigenin and its oxidation product, N-methylacridone, are strongly
fluorescent compounds, which allows to observe the light emission without any energy acceptor.
The most reasonable mechanism (involving a intermediate peroxide) is shown in the reaction
- (see description of the experiment with lucigenin) .
In the first phase, the color of the fluorescent lucigenin (light green) is emitted, then the
color changes to a light blue fluorescence of N-methylacridone.