ISSN:
0021-8383
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Studies on Photo Fading of Tautomeric Azo Dyes. V. Oxydation of Substituted 1-Phenylazo-2-naphtholes by Singlet Oxygen in a Polymeric MatrixThe logarithms of rate constants of methylene blue sensitized photolysis of substituted 1-phenylazo-2-naphthols (1a-y) in polymer matrix show no linear correlationship with respect to Hammett-δ-constants of the substituents.The slope of the function lg k = f(δ), where k represents rate constants, differs for positive and negative δ-values in sign but decomposition is oxydative at all substituents. It is possible to explain the nonlinear correlation, when singlet oxygen 1O2 attacks only the anti-hydrazone-tautomer in the dyes investigated.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/prac.19833250610