Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F07%3A00019036" target="_blank" >RIV/60461373:22330/07:00019036 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization
Original language description
Interaction of meso-tetrakis(4-sulphonatophenyl)porphyrine (TPPS4) with chitosan has been studied previously in aqueous solutions. It has been found that this polysaccharide induce and support self-aggregation of TPPS4 at appropriate concentrations and pH. The mode of aggregation was strongly dependent on pH: stacking (H-type) aggregates predominated at neutral and weak acidic conditions (pH 4.8-6.8) and tilted (J-type) aggregates at pH 2.5. CD titration experiments confirmed the formation of opticallyactive macrocycles in the presence of chitosan. An addition of powder porphyrin to chitosan solution (pH ~7 and 2) led to the rapid formation of coloured precipitates assigned respectively as chitosan/TPPS4 complexes 1 and 2. Spectroscopic methods (vis-NIR, FT-IR, Raman and 13C CP-MAS NMR) confirmed that macrocycles are highly aggregated in both these complexes. H- and J-aggregates of TPPS4 were indicated in 1 and 2, respectively. Elemental analysis and solid state NMR showed that 1 cont
Czech name
Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu.
Czech description
Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu.
Classification
Type
D - Article in proceedings
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
CUKRBLIK 2007: Current Chemistry and Biochemistry of Saccharides, Book of Abstracts
ISBN
80-7080-560-9
ISSN
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e-ISSN
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Number of pages
1
Pages from-to
19
Publisher name
Česká chemická společnost
Place of publication
Praha
Event location
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Event date
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Type of event by nationality
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UT code for WoS article
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