F. Amat‐Guerri, M. Carrascoso, M. Luiz
Mar 15, 1998
Citations
0
Influential Citations
6
Citations
Journal
Journal of Photochemistry and Photobiology A-chemistry
Abstract
Abstract The Rose Bengal sensitized photooxidation of 2,3-dihydroxynaphthalene (2,3-DHN) and 2,7-dihydroxynaphthalene (2,7-DHN) in pH 12 water yields 1,1′-dimeric products, the appearance of which can be explained by the coupling of radicals formed by primary electron transfer from the anionic form of each starting dihydroxynaphthalene to singlet molecular oxygen or to the excited sensitizer. The dimer from 2,7-DHN is further oxidised during the irradiation to 6,7-dihydroxyperylene-1,12-quinone (DHPQ). In the case of 2,3-DHN, phthalic acid has also been detected.