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

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 optically active 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 contained more chito 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 optically active 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 contained more chito (en) Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu. (cs)
Title	Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization (en) Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu. (cs)
skos:prefLabel	Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization (en) Příprava a charakterizace pevných porfyrinových makrocyklických agregátů na base chitosanu. (cs)
skos:notation	RIV/60461373:22330/07:00019036!RIV08-MSM-22330___
http://linked.open.../vavai/riv/strany	19
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6046137305), Z(MSM6046137307)
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Ederová, Jana Maryška, Martin Volka, Karel Král, Vladimír Čopíková, Jana Synytsya, Andriy Synytsya, Alla
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta potravinářské a biochemické technologie
http://linked.open...dnocenehoVysledku	450934
http://linked.open...ai/riv/idVysledku	RIV/60461373:22330/07:00019036
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	porphyrine; aggregations; chitosan (en)
http://linked.open.../riv/klicoveSlovo	aggregations porphyrine chitosan
http://linked.open...ontrolniKodProRIV	[2B07D252E4FF]
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	CUKRBLIK 2007: Current Chemistry and Biochemistry of Saccharides, Book of Abstracts
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...iv/tvurceVysledku	Král, Vladimír Synytsya, Andriy Čopíková, Jana Synytsya, Alla Maryška, Martin Ederová, Jana Volka, Karel Blafková, Petra Spěvaček, Jiří
http://linked.open...n/vavai/riv/zamer	Teoretické základy potravinářských a biochemických technologií Physico-chemical methods of analysis and characterization of chemical systems and biosystems
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Česká chemická společnost
https://schema.org/isbn	80-7080-560-9
http://localhost/t...ganizacniJednotka	22330
is http://linked.open...avai/riv/vysledek of	Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization Solid aggregates of porphyrin macrocycles on chitosan scaffold: preparation and characterization

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 58 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software