pH-controlled self-assembling of meso-tetrakis(4-sulfonatophenyl)porphyrin-chitosan complexes
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
19301895
DOI
10.1021/bm8011715
Knihovny.cz E-resources
- MeSH
- Spectroscopy, Near-Infrared MeSH
- Chitosan chemistry MeSH
- Hydrogen-Ion Concentration MeSH
- Magnetic Resonance Spectroscopy MeSH
- Microscopy, Atomic Force MeSH
- Molecular Structure MeSH
- Nanostructures chemistry MeSH
- Porphyrins chemistry MeSH
- Surface Properties MeSH
- Temperature MeSH
- Particle Size MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Chitosan MeSH
- meso-tetrakis(4-sulfonatophenyl)porphyrin MeSH Browser
- Porphyrins MeSH
Solid meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS(4))-chitosan supramolecular complexes were prepared by addition of porphyrin to an aqueous solution of chitosan at pH values. The precipitates obtained were assigned as 1 (pH 6.8) and 2 (pH 2.5) and characterized by spectroscopic, thermal, and microscopic methods. Spectroscopic investigation confirmed the presence of TPPS(4) and chitosan in both products and that the porphyrin is highly self-associated. H-type (stacked) of TPPS(4) aggregation was proposed for 1 and J-type (tilted) for 2. Thermal analysis revealed different pyrolysis routes of the complexes depending on their structural diversity. Light microscopic analysis indicated fibrous and lamellar microstructures, respectively, for 1 and 2. SEM and AFM analysis showed that both complexes consist of compact nanostructures; their size and interconnection is different for 1 and 2. Based on structural inferences, self-assembling hierarchy models were proposed for both of the TPPS(4)-chitosan supramolecular complexes.
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