Affiliation:
1. Research Laboratories, Eastman Kodak Company, Rochester, New York 14650
Abstract
Raman spectra of a number of azo dye structures have been analyzed. In azonaphthol and azopyrazol dyes, hydroxyazo to keto-hydrazone tautomerizations, [Formula: see text] were observed in aqueous basic and acidic media. Observations of azo and ring vibrations, as well as hydrazone (C=N plus C=0) bands, were made. It was noted that the azo-anions (examined at pH 12) convert to the protonated neutral hydrazone (keto) form in aqueous acid (run at pH 2). Infrared spectra were used to confirm the presence of the C=0 group in keto-tautomeric forms.
Subject
Spectroscopy,Instrumentation
Reference24 articles.
1. (a) Herzberg G., Infrared and Raman Spectra of Polymeric Molecules (Van Nostrand Reinhold, New York, 1945), p. 256;
2. The Infra-red Spectra of Complex Molecules
3. Infrared and Raman spectra of solid and matrix isolated diimide, HNNH
Cited by
101 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献