The UV and VIS Absorption Spectra of Jatrorubine
| Autor: | Š. Komorsky-Lovrić, Z. Gašparec |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1981 |
| Zdroj: | Croatica Chemica Acta Volume 54 Issue 1 |
| ISSN: | 1334-417X 0011-1643 |
| Popis: | The absorption spectra of water, methanolic, ethanolic and propanolic solutions of jatrorubine in the VIS and UV spectral range were recorded. The acidity and the alkalinity of the solutions were changed in the wide range from pH = 2 to pH = 13 by the addition of KOH and HCl in the solutions. From the influence of pH on the shapes of the absorption curves, it was concluded that jatrorubine exists as quaternary aminic cation in the acidic medium and as the resonance dipole molecula in the basic media, but no evidence for the existence of carbinolic form was found. The results were compared with the literature data. |
| Databáze: | OpenAIRE |
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