Vibrational Manifold Considerations for the Metal Indicator Dye 2-(2-Pyridylazo)-1-Naphthol

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Metallized pyridyl azonaphthol dyes show a well-resolved vibronic manifold in the absorption spectra of their main hue band. The vibrations and groups causing this vibronic activity were investigated by resonance Raman spectroscopy, absorption spectroscopy, and molecular orbital calculations. Resonance Raman intensity enhancements of up to 5 × 104 were observed, and all of the major group vibrations were strongly enhanced. Consequently, we have concluded that the resolvable vibronic manifold has its origin in several group vibrations.

Keywords: Azo dye; Raman spectroscopy; Resonance spectrum

Document Type: Research Article


Affiliations: Research Laboratories, Eastman Kodak Company, Rochester, New York 14650

Publication date: May 1, 1981

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