About: Singlet Oxygen Imaging in Polymeric Nanofibers by Delayed Fluorescence

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Polymeric nanofiber materials loaded with photosensitizers exhibit significant antibacterial activity due to their generation of cytotoxic singlet oxygen O2(1Δg). A time-gated fluorescence imaging technique was used to monitor the photosensitized processes in polystyrene (PS) and gelatin (GE) nanofibers loaded with 0.1 wt % tetraphenylporphyrin (TPP) photosensitizer. The fluorescence decay of TPP at the periphery of the PS nanofibers was single exponential. Increased fluorescence quenching was observed in the domains with higher TPP loading, located in the center of the nanofibers, and added a shorter lifetime component to the kinetics. The domains exhibiting singlet oxygen activity within the nanofibers were visualized and analyzed by singlet oxygen-sensitized delayed fluorescence imaging (SODF). Whereas O2(1Δg) was produced in PS nanofibers, its production in GE nanofibers was limited. These results were confirmed by time-resolved phosphorescence measurements at 1270 nm. Polymeric nanofiber materials loaded with photosensitizers exhibit significant antibacterial activity due to their generation of cytotoxic singlet oxygen O2(1Δg). A time-gated fluorescence imaging technique was used to monitor the photosensitized processes in polystyrene (PS) and gelatin (GE) nanofibers loaded with 0.1 wt % tetraphenylporphyrin (TPP) photosensitizer. The fluorescence decay of TPP at the periphery of the PS nanofibers was single exponential. Increased fluorescence quenching was observed in the domains with higher TPP loading, located in the center of the nanofibers, and added a shorter lifetime component to the kinetics. The domains exhibiting singlet oxygen activity within the nanofibers were visualized and analyzed by singlet oxygen-sensitized delayed fluorescence imaging (SODF). Whereas O2(1Δg) was produced in PS nanofibers, its production in GE nanofibers was limited. These results were confirmed by time-resolved phosphorescence measurements at 1270 nm. (en)
Title	Singlet Oxygen Imaging in Polymeric Nanofibers by Delayed Fluorescence Singlet Oxygen Imaging in Polymeric Nanofibers by Delayed Fluorescence (en)
skos:prefLabel	Singlet Oxygen Imaging in Polymeric Nanofibers by Delayed Fluorescence Singlet Oxygen Imaging in Polymeric Nanofibers by Delayed Fluorescence (en)
skos:notation	RIV/61388980:_____/10:00351766!RIV11-GA0-61388980
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/08/0831), P(GAP208/10/1678), Z(AV0Z40320502), Z(AV0Z40400503), Z(MSM0021620857)
http://linked.open...iv/cisloPeriodika	48
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Lang, Kamil Hostomský, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav anorganické chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	287565
http://linked.open...ai/riv/idVysledku	RIV/61388980:_____/10:00351766
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	molecular-oxygen; meso-tetralylporphyrins; photodynamic therapy (en)
http://linked.open.../riv/klicoveSlovo	molecular-oxygen photodynamic therapy meso-tetralylporphyrins
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[97FB03CFC653]
http://linked.open...i/riv/nazevZdroje	Journal of Physical Chemistry B
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Photophysics and Photochemistry of Self-Assembled Nanostructures Nanofabrics producing singlet oxygen
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	114
http://linked.open...iv/tvurceVysledku	Hof, Martin Kubát, Pavel Lang, Kamil Sýkora, Jan Franc, Jiří Hostomský, Jiří Mosinger, J.
http://linked.open...ain/vavai/riv/wos	000284738800006
http://linked.open...n/vavai/riv/zamer	Design, syntéza a charakterizace klastrů, kompozitů, komplexů a dalších sloučenin na bázi anorganických látek; mechanismy a kinetika jejich interakcí Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace Nové molekulární systémy pro pokročilé aplikace prospěšné pro zdraví a šetrné k životnímu prostředí
issn	1520-6106
number of pages	7 (xsd:int)

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