Revista Colombiana de Química
versão impressa ISSN 0120-2804
DIAZ, Carlos E.; LEON, Freddy; MARTINEZ, Fernando e DAZA, Martha C.. OXIDATION OF ANTHRACENE WITH SINGLET OXIGEN GENERATED CHEMICALLY BY THE SODIUM MOLIBDATE/HYDROGEN PEROXIDE SYSTEM. Rev.Colomb.Quim. [online]. 2008, vol.37, n.1, pp. 45-52. ISSN 0120-2804.
The oxidation of anthracene with singlet oxygen, chemically generated by sodium molybdate/hydrogen peroxide system (Na2MoO4/H2O2), was studied in an inverted mycelle-type microemulsion (Oil/ Water). The tracking of the reaction was carried out by measuring the absorbance at the 375 nm band, using UV-Vis spectrophotometry. Oxidation products (anthraquinone, endoperoxide-9,10-anthracene, 9-hydroxyanthrone, anthrone and 9,10-dihydrodihydroxianthracene) were identified by gas chromatography massspectrometry (GC-MS). The first three products come of the singlet oxygen [4+2] cycloaddition on the anthracene. Anthrone and 9,10-dihydrodihydroxianthracene can be generated by the presence of a radical that is produced in the reaction. Under the used reaction conditions it was determined the rate constant of the oxidation with oxygen singlet.
Palavras-chave : Anthracene; sodium molibdate/ hydrogen peroxide; singlet oxygen; sodium azide; oxidation.