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'HPLC Separation' in keywords Facet   Publication Year 1992  [X]
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1Author    M. J. Melo, Fernando Pina, A. Ntónio, L. M. Açanita, EuricoC. Melo, Christiane Herrm, R. Olf Förster, HelmUt Koch, Heinrich WamhoffRequires cookie*
 Title    Photochemistry of 2-(2-Furyl)-benzimidazole (Fuberidazole)  
 Abstract    The photodegradation o f 2-(2-Furyl)-benzim idazole (Fuberidazole 1) has been reinvestigat­ ed employing advanced H P L C -U V /V IS technique and fluorescence emission and excitation spectroscopy in methanol at natural pH , in acidic medium and in aqueous solutions at pH 7 and 3, and four main products benzim idazole-2-carboxylic acid 3, its methyl ester 2, 1-methoxy benzimidazole 5, methyl 4-oxo-2-benzim idazole crotonate 7 (cis and trans isomers) besides benzimidazole 4 and 2,2'-bibenzimidazole 6 and other side products have been isolated and characterized. The kinetics o f the photodegradation process was followed independently by H P L C -U V and fluorescence emission showing a significant similarity o f the curve habit; this allows to m onitor a photodegradation at very low concentrations (5 -10-5—5 -10-6 M). The quantum yield o f disappearance o f Fuberidazole has been determined. 
  Reference    Z. Naturforsch. 47b, 1431—1437 (1992); received April 6 1992 
  Published    1992 
  Keywords    2-(2-Furyl)-benzimidazole, Fuberidazole, Photodegradation, HPLC Separation, Fluorescence Emission 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1431.pdf 
 Identifier    ZNB-1992-47b-1431 
 Volume    47