photochemical reaction


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Related to photochemical reaction: photochemical smog, photochemistry

photochemical reaction

[¦fōd·ō′kem·ə·kəl rē′ak·shən]
(physical chemistry)
A chemical reaction influenced or initiated by light, particularly ultraviolet light, as in the chlorination of benzene to produce benzene hexachloride.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Unlike the 0-degree case, the photochemical reaction occurs in the solar radiation zone as shown in Figure 3b and 3c.
We have previously exposed cultured lung cells to similar multipollutant mixtures in the photochemical reaction chamber and showed that gaseous products elicited biological and biochemical responses in the absence of particles (Sexton et al.
The pigments-protein complexes in PSII, such as LHCII, RC, CP26 and CP 29, CP 43 and CP47, are assigned subtly, and the energy can be transferred through them for photochemical reactions because the distances between any two neighboring units are close enough (from 10 A to 20 [Angstrom]).
* the topology of the photochemical reactions and their relation to the development of the pH gradient across the thylakoid membrane
10:30 PHOTOCHEMICAL REACTION OF A YE PRECURSOR 4-CHLORO-1,2-PHENYLENEDIAMINE AND ITS ASSOCIATED MUTAGENIC EFFECTS
3,5-Dibromoindene-1-one (6) was generated by radical bromination of 5- bromoindanone (1b) using 2.2 equivalents of N- bromosuccinimid (NBS) in a photochemical reaction apparatus equipped with a reflux condenser in CCl4 at 77 C (Scheme 1).
For photochemical reactions the higher concentration causes a higher light absorption and consequently accelerates the degradation rate [26].
(2007) examined the effect of ammonium sulfate aerosol on the photochemical reactions of toluene (mostly from cars) and nitrogen oxides to form those secondary organic particles.
Subsequently, the prepared compound was irradiated by laser beams (980 nm wavelength) and the photochemical reaction as well as the liberation of the target species was investigated."
The complexes, 1-9 were prepared by the photochemical reactions of metal carbonyls M[(CO).sub.6] (M = Cr, Mo, W) with [SB.sup.1], [SB.sup.2], [SB.sup.3] and were obtained in 65 -75% yields by the method given below.
A systematic study of photochemical reactions started at the dawn of the 19th century and the beginning of the 20th century.
These results demonstrate that some of the [C.sub.60] molecules are bonded to PMMA and form some [C.sub.60]-PMMA adducts by photochemical reaction during laser irradiation in nitrogen.

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