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Chemiluminescence differs from fluorescence or phosphorescence in that the electronic excited state is the product of a chemical reaction rather than of the absorption of a photon. It is the antithesis of a photochemical reaction, in which light is used to drive an endothermic chemical reaction.
Electrochemiluminescence or electrogenerated chemiluminescence (ECL) is a kind of luminescence produced during electrochemical reactions in solutions. In electrogenerated chemiluminescence, electrochemically generated intermediates undergo a highly exergonic reaction to produce an electronically excited state that then emits light upon relaxation to a lower-level state.
Chemiluminescence is the emission of light through a chemical reaction. It contrasts with fluorescence , which is excited by a light source. During chemiluminescence, the vibrationally excited product of an exoergic chemical reaction relaxes to its ground state with the emission of photons . [ 1 ]
Chemiluminescence of luminol. To exhibit its luminescence, the luminol must be activated with an oxidant. Usually, a solution containing hydrogen peroxide (H 2 O 2) and hydroxide ions in water is the activator. In the presence of a catalyst such as an iron or periodate compound, the hydrogen peroxide decomposes to form oxygen and water: 2 H 2 O ...
Chemiluminescence (1 C, 11 P) F. Fluorescence (4 C, 40 P) L. Luminescent minerals (1 C, 90 P) P. Phosphors and scintillators (1 C, 36 P) Pages in category "Luminescence"
However, in the presence of a fluorescer, light can be generated (chemiluminescence). Peroxyoxalate chemiluminescence (CL) was first reported by Rauhut in 1967 [1] in the reaction of diphenyl oxalate. The emission is generated by the reaction of an oxalate ester with hydrogen peroxide in the presence of a suitably fluorescent energy acceptor.
Luminol and haemoglobin, an example of chemiluminescence UV-photoluminescence in microbiological diagnostics. Luminescence is a spontaneous emission of radiation from an electronically or vibrationally excited species not in thermal equilibrium with its environment.
Chemiluminescent immunoassay (CLIA) is a type of immunoassay employing chemiluminescence. [1] [2] See also. Enzyme-linked immunosorbent assay (ELISA) References