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SM ISO690:2012 BOLDESCU, Veaceslav, KACSO, Irina E., BRATU, Ioan, DUCA, Gheorghe. Spectrophotometric studies of sanguinarine-β-cyclodextrin complex formation
. In: Chemistry Journal of Moldova, 2008, nr. 1(3), pp. 85-88. ISSN 1857-1727. |
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Chemistry Journal of Moldova | ||||||
Numărul 1(3) / 2008 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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Pag. 85-88 | ||||||
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The main aim of this study was to investigate the infl uence 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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Cuvinte-cheie sanguinarine, β-cyclodextrin, UV-vis spectrophotometry, inclusion complex, association constant |
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