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Modification of chitosan-methylcellulose composite films with meso-tetrakis(4-sulfonatophenyl)porphyrin
A. Synytsya, M. Grafová, P. Slepicka, O. Gedeon, A. Synytsya,
Language English Country United States
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
22181561
DOI
10.1021/bm2015366
Knihovny.cz E-resources
- MeSH
- Absorption MeSH
- Biocompatible Materials chemical synthesis MeSH
- Chitosan chemistry MeSH
- Circular Dichroism MeSH
- Hydrogen-Ion Concentration MeSH
- Drug Delivery Systems methods MeSH
- Methylcellulose chemistry MeSH
- Microscopy, Electron, Scanning MeSH
- Molecular Structure MeSH
- Porphyrins chemistry MeSH
- Spectrum Analysis, Raman MeSH
- Spectroscopy, Fourier Transform Infrared MeSH
- Water MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Polysaccharide films containing chitosan, methylcellulose, and a mixture of these polysaccharides in various ratios were prepared and modified with meso-tetrakis(4-sulfonatophenyl)porphyrin in an aqueous medium at pH 7. The modified films were compared with the initial films using spectroscopic methods and microscopic imaging. Electronic (UV-vis absorption, electronic circular dichroism (ECD)) and vibrational (FTIR and Raman) spectra showed that the porphyrin macrocycles had a strong affinity toward chitosan and did not interact with the methylcellulose. The total porphyrin uptake depended on the chitosan: methylcellulose ratio and pure methylcellulose films did not retain porphyrin macrocycles. ECD measurements detected the presence of optically active porphyrin species bound to the films. SEM and AFM images confirmed that the porphyrin macrocycles caused structural changes on the film surface and within the film layer.
References provided by Crossref.org
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