1) The photoreaction behavior of CCU in simulated atmosphere, water, and organic solvents has been studied in this paper.

2) Experiments showed that the photoreaction is affected by the solution pH value and by the presence of carboxylic acids and surface-active agents. The reaction mechanism was preliminarily discussed.

3) Owing to the well know photoreaction of diazonium and sulfonate groups, the above-assembled films containing multiplayer of DAR/FeTSPP were irradiated by UV light.

4) Under irradiation, photoreaction occurring between adjacent layers was confirmed by UV Vis and Fourier transform infrared(FTIR) spectra, which covalently attached DNA to DAR in the multilayer.

5) Compared with the photoreaction in distilled water, the ions in artificial seawater could enhance the photolysis of naphthalene.

6) High-pressure mercury lamps were more effective for exciting the photoreaction of naphthalene relative to sunlight.

7) This article reviews the basical concepts of environmental photochemistry of pesticides, main photoreaction and the implication of light-induced transformation.

8) In short daylight, the tillering numbers of the varieties insensitive to photoreaction changed a little, but that of the varieties sensitive to photoreaction were increased extremely significantly.