Chemiluminescence

(redirected from chemiluminescent)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

chemiluminescence

[‚kem·i‚lüm·ə′nes·əns]
(physical chemistry)
Emission of light as a result of a chemical reaction without an apparent change in temperature.

Chemiluminescence

 

luminescence associated with a chemical reaction. Either the reaction products or components excited as a result of energy transfer from the reaction products may emit the light. A special case of chemiluminescence is bioluminescence—for example, the glow of decaying wood or of certain insects and marine animals.

Chemiluminescence may accompany gase-phase, liquid-phase, or heterogeneous reactions. The emission spectrum may lie in the infrared, visible, or ultraviolet region. Chemiluminescence is observed in spontaneous reactions—that is, when reactants are mixed—and in reactions that occur, for example, during an electric discharge, during electrolysis (galvanoluminescence), or upon exposure to light or to ionizing radiation.

Chemiluminescence is an example of the direct conversion of chemical energy into luminous energy. The brightness of chemiluminescence is proportional to the reaction rate and to the efficiency of light production, that is, the number of photons emitted per reaction event. The efficiency of light production approaches 100 percent for the bioluminescence of certain fireflies and approaches 25 percent for reactions in which esters of oxalic acid are oxidized by hydrogen peroxide. In certain reactions (“bright” reactions), the efficiency is about 1 percent; in other cases, it is considerably lower. Therefore, highly sensitive photoelectric equipment is used to detect chemiluminescence, especially in slow reactions.

The study of chemiluminescence makes it possible to solve subtle theoretical problems regarding the elementary event of chemical conversion, the redistribution of energy in reaction products, and the structure of molecules. In addition, reaction rates or the concentrations of substances can be measured (see). Reactions characterized by intense chemiluminescence are used in chemiluminescent light sources, which are activated by the mixing of reactants and yield luminous fluxes of —0.1 lumen per milliliter of solution. Chemiluminescense is the basis for the operation of chemical lasers.

REFERENCES

Vasil’ev, R. F. “Mekhanizmy vozbuzhdeniia khemiliuminestsentsii.” Uspekhi khimii, 1970, vol. 39, issue 6, p. 1130.
Khemiliuminestsentnye metody issledovaniia medlennykh khimicheskikhprotsessov. Moscow, 1966.
Chemiluminescence and Bioluminescence. New York-London, 1973.

R. F. VASILEV

References in periodicals archive ?
Reduction in biotin and streptavidin interaction consequently leads to decreased chemiluminescent emission.
A significant apparent digoxin concentration was observed both in vitro and in vivo using the fluorescence polarization immunoassay, but no apparent digoxin concentration was observed using enzyme-linked chemiluminescent immunosorbent digoxin assay and turbidimetric assay.
aureus cells were selectively labeled with a monoclonal-horseradish peroxidase (POD) conjugate, collected by membrane filtration, and detected with a luminometer and an enhanced chemiluminescent luminol reagent.
LI-COR Biosciences' patent-pending technology pairs quality chemiluminescent images with the versatility of a personal scanner.
Sources Sought:Licor Fluorescent and Chemiluminescent Service Contract
With planned distribution from 1 July 2017, PATHFAST is an easy to use, bench-top chemiluminescent immunoassay analyzer providing affordable, core-lab quality results from whole blood samples in under 17 minutes.
com)-- ALPCO has released its new STELLUX[R] Chemiluminescent Ultrasensitive Active GLP-1 ELISA (7-36) amide, the most sensitive active GLP-1 assay on the market.
Their topics include the history of coral disease research, the innate immune system in cnidarians, the physiology of skeletogenesis in scleractinian coral, aspergillosis of Caribbean Sea fan corals, skeletal growth anomalies in corals, cyanobacteria-associated colored-band diseases of the Atlantic and Caribbean, coral "bleaching" as a generalized stress response to environmental disturbance, biocontainment practices for coral disease research, and chemiluminescent methods for quantifying DNA abasic lesions in scleractinian coral tissues.
The DiaSorin LIAISON XL Analyzer is a fully-automated, random access, chemiluminescent immunoassay analyzer for in vitro diagnostic analysis on human serum or plasma.
Lumigen HyPerBlu, a chemiluminescent substrate from Beckman Coulter, enables direct detection of hydrogen peroxide.
Lumigen had 2005 sales of $33 million, approximately 40% of which were from sales of chemiluminescent substrate to Beckman Coulter for use with its immunoassay analyzers.