1H, 13C, NH, HH, CH COSY, HH NOESY NMR and UV-vis studies of Solophenyl red 3BL dye azo-hydrazone tautomerism in various solvents
| Autor: | Mohammad Hossein Habibi, M.R.A. Poor Heravi, M. Abdollahi-Alibeik, Asghar Zeini-Isfahani, Ali Hassanzadeh |
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| Rok vydání: | 2004 |
| Předmět: |
Magnetic Resonance Spectroscopy
Hydrazone Photochemistry Hydrocarbons Aromatic Analytical Chemistry chemistry.chemical_compound Ultraviolet visible spectroscopy Amide Organic chemistry Dimethyl Sulfoxide Deuterium Oxide Spectroscopy Coloring Agents Instrumentation chemistry.chemical_classification Carbon Isotopes Nitrogen Isotopes Hydrazones Stereoisomerism Tautomer Atomic and Molecular Physics and Optics chemistry Proton NMR Solvents Spectrophotometry Ultraviolet Tetramethylsilane Two-dimensional nuclear magnetic resonance spectroscopy Azo Compounds Hydrogen |
| Zdroj: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 63(2) |
| ISSN: | 1386-1425 |
| Popis: | Azo-hydrazone tautomeric behavior of polyazo Solophenyl red 3BL (C.I. Direct 80) dye in different solvents (water, methanol and DMSO) was investigated using 1H, 13C, NH, HH, CH COSY, HH NOESY NMR techniques and UV–vis spectroscopy. Two-dimensional NMR experiments were used to assign 1H, 13C and 15N NMR lines unambiguously. Results showed that the hydrazone-form proton NMR signal appeared in the weakest field with respect to tetramethylsilane, in comparison with the amide and phenolic proton NMR signals. UV–vis absorption spectroscopic evidences showed that azo-hydrazone mixture exists in water and DMSO solvents, but in methanol, only azo tautomer was dominant, which was in a good agreement with NMR spectroscopic results. |
| Databáze: | OpenAIRE |
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