SPECTROPHOTOMETRIC STUDIES OF SANGUINARINE-Β-CYCLODEXTRIN COMPLEX FORMATION
The main aim of this study was to investigate the influence of pH and the presence of hydrophilic polymer polyvinylpyrrolidone on the formation of sanguinarine-β-cyclodextrin (SANG-β-CD) inclusion complex. Spectrophotometric studies of the SANG-β-CD systems in the presence and without 0.1 % PVP at t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academy of Sciences of Moldova, Institute of Chemistry
2008-06-01
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| Series: | Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry |
| Subjects: | |
| Online Access: | http://www.cjm.asm.md/sites/default/files/article_files/Boldescu%20Spectrophotometric.pdf |
| Summary: | The main aim of this study was to investigate the influence of pH and the presence of hydrophilic polymer polyvinylpyrrolidone on the formation of sanguinarine-β-cyclodextrin (SANG-β-CD) inclusion complex. Spectrophotometric studies of the SANG-β-CD systems in the presence and without 0.1 % PVP at the pH 5.0 did not show any evidence of the complex formation. However, the same systems showed several obvious evidences at the pH 8.0: the hyperchromic and the hypochromic effects and the presence of the isosbestic point in the region of 200 – 210 nm. The association constants calculated by three linear methods: Benesi-Hildebrand, Scott and Scatchard, were two times higher for the systems with addition of 0.1% PVP than for the systems without it. |
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| ISSN: | 1857-1727 2345-1688 |