chemiluminescence

chemiluminescence
/kem'euh looh'meuh nes"euhns/, n.
(in chemical reactions) the emission of light by an atom or molecule that is in an excited state.
[1900-05; CHEMI- + LUMINESCENCE]

* * *

      emission of electromagnetic radiation during the course of chemical reactions. Such radiation, whether ultraviolet, visible, or infrared, is most commonly generated by oxidation. The radiation can usually be ascribed to the transfer of the oxidation energy to a molecule that is itself not undergoing oxidation. This molecule then loses the excitation energy by emitting light of the proper wavelength. A large number of substances (e.g., formaldehyde, paraldehyde, acrolein, lophine, glucose, lecithin, and cholesterol) luminesce if slowly oxidized in alcoholic alkaline solution. Another group of chemiluminescences is connected with the oxidation of sulfur compounds. The widespread luminescence of such living organisms as fireflies and bacteria is based on the oxidation of luciferin in the presence of an enzyme, luciferase. Chemiluminescence that occurs in living organisms is called bioluminescence (q.v.).

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • chemiluminescence — [kem΄i lo͞o΄mə nes′əns] n. visible light produced by chemical action and not accompanied by heat, including bioluminescence chemiluminescent adj …   English World dictionary

  • Chemiluminescence — A chemoluminescent reaction carried out in an erlenmeyer flask producing a large amount of light. Chemiluminescence (sometimes chemoluminescence ) is the emission of light with limited emission of heat (luminescence), as the result of a chemical… …   Wikipedia

  • chemiluminescence — chemiliuminescencija statusas T sritis chemija apibrėžtis Cheminio proceso sukelta liuminescencija. atitikmenys: angl. chemiluminescence rus. хемилюминесценция …   Chemijos terminų aiškinamasis žodynas

  • chemiluminescence — chemiliuminescencija statusas T sritis fizika atitikmenys: angl. chemiluminescence vok. Chemolumineszenz, f rus. хемилюминесценция, f pranc. chimiluminescence, f …   Fizikos terminų žodynas

  • chemiluminescence — chemiliuminescencija statusas T sritis ekologija ir aplinkotyra apibrėžtis Švytėjimas, sukeliamas cheminių reakcijų energijos, kai jos pakanka sužadinti tarpinių ar galutinių reakcijų produktų energijos lygmenis. atitikmenys: angl.… …   Ekologijos terminų aiškinamasis žodynas

  • chemiluminescence indicator — chemiliuminescencinis indikatorius statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiaga, lygiavertiškumo taške liuminescuojanti arba gesinanti liuminescenciją. atitikmenys: angl. chemiluminescence indicator vok. Chemolumineszenz… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • chemiluminescence indicator — chemiliuminescencinis indikatorius statusas T sritis chemija apibrėžtis Medžiaga, ekvivalentiniame taške liuminescuojanti arba gesinanti liuminescenciją. atitikmenys: angl. chemiluminescence indicator rus. хемилюминесцентный индикатор …   Chemijos terminų aiškinamasis žodynas

  • chemiluminescence — noun Etymology: International Scientific Vocabulary Date: 1889 luminescence (as bioluminescence) due to chemical reaction • chemiluminescent adjective …   New Collegiate Dictionary

  • chemiluminescence — n. [Gr. chemeia, pert. chemistry; L. luminescere, to grow light] Enzymatic light production without increase in temperature in the course of a chemical reaction; bioluminescence …   Dictionary of invertebrate zoology

  • chemiluminescence — Light emitted as a reaction proceeds. Becoming used increasingly to assay ATP (using firefly luciferase) and the production of toxic oxygen species by activated phagocytes (using luminol or lucigenin as bystander substrates that release light… …   Dictionary of molecular biology

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”