Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu.

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization

Popis výsledku anglicky

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

Druh

D - Stať ve sborníku

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

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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Počet stran výsledku

1

Strana od-do

19

Název nakladatele

Česká chemická společnost

Místo vydání

Praha

Místo konání akce

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Datum konání akce

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Typ akce podle státní příslušnosti

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Kód UT WoS článku

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