photolysis

photolytic /foht'l it"ik/, adj.
/foh tol"euh sis/, n.
the chemical decomposition of materials under the influence of light.
[1910-15; PHOTO- + -LYSIS]

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Breakdown of molecules into smaller units via absorption of light.

Flash photolysis, an experimental technique developed by Manfred Eigen, Ronald George Weyford Norrish, and George Porter, studies short-lived chemical intermediates formed in many photochemical reactions. An intense, brief flash of light splits molecules into short-lived fragments, which are analyzed by spectrophotometry in a second, less intense flash.

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      chemical process by which molecules are broken down into smaller units through the absorption of light.

      The best-known example of a photolytic process is the experimental technique known as flash photolysis, employed in the study of short-lived chemical intermediates formed in many photochemical reactions. The technique, which was developed by the English chemists R.G.W. Norrish and George Porter in 1949, consists of subjecting a gas or liquid to an intense burst of light lasting a few microseconds or milliseconds, followed by a second, ordinarily less intense flash. The first flash dissociates the absorbing compound into short-lived molecular fragments and the second flash provides a means for their identification by spectrophotometry. The method is a valuable tool for the identification of transient chemical intermediates and hence for the study of mechanisms of fast chemical reactions.

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Universalium. 2010.

Look at other dictionaries:

  • photolysis — photolysis. См. фотолиз. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • photolysis —  Photolysis  Фотолиз   превращение молекул вещества под действием поглощенного света (напр., диссоциация, ионизация, окисление) …   Толковый англо-русский словарь по нанотехнологии. - М.

  • photolysis — [fō täl′ə sis] n. [ModL: see PHOTO & LYSIS] chemical decomposition due to the action of light photolytic [fōt΄ə lit′ik] adj …   English World dictionary

  • photolysis — fotolizė statusas T sritis radioelektronika atitikmenys: angl. photolysis vok. Fotolyse, f rus. фотолиз, m pranc. photolyse, f …   Radioelektronikos terminų žodynas

  • photolysis — fotolizė statusas T sritis chemija apibrėžtis Medžiagų skilimas dėl regimosios ar ultravioletinės spinduliuotės poveikio. atitikmenys: angl. photolysis rus. фотолиз ryšiai: sinonimas – fotocheminė disociacija …   Chemijos terminų aiškinamasis žodynas

  • photolysis — fotocheminė disociacija statusas T sritis fizika atitikmenys: angl. photochemical dissociation; photolysis vok. photochemische Dissoziation, f; Photodissoziation, f; Photolyse, f rus. фотодиссоциация, f; фотолиз, m; фотохимическая диссоциация, f… …   Fizikos terminų žodynas

  • photolysis — fotolizė statusas T sritis ekologija ir aplinkotyra apibrėžtis Medžiagų skilimas dėl regimosios ar ultravioletinės spinduliuotės poveikio. atitikmenys: angl. photochemical degradation; photolysis vok. photochemischer Abbau, m; Photolyse, f rus.… …   Ekologijos terminų aiškinamasis žodynas

  • photolysis — noun Etymology: New Latin Date: 1911 chemical decomposition by the action of radiant energy (as light) • photolytic adjective • photolytically adverb …   New Collegiate Dictionary

  • photolysis — Light induced cleavage of a chemical bond, as in the process of photosynthesis …   Dictionary of molecular biology

  • photolysis — noun Any chemical reaction in which a compound is decomposed after absorbing a photon See Also: photolyase, photolyte, photolytic …   Wiktionary

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