About: Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.molstruc.2012.12.029
Description	Tetra-propyl-porphycene (TPrPo) in solution has been studied by means of time-and spectral-resolved near-infrared (NIR) luminescence spectroscopy. The NIR luminescence kinetics exhibits surprising dependence on oxygen concentration. There is a clearly visible long-lived (microsecond range) rise-section in biexponential kinetics at broad NIR spectral range of 800-1100 nm for lowered oxygen concentrations. The rise-section is not present in nitrogen-saturated samples and it also disappears after addition of singlet oxygen (O-1(2)) physical quencher DABCO, which means that the effect is O-1(2)-mediated. Kinetics of TPrPo delayed fluorescence detected around 650 nm possess a similar rise-decay character in microsecond range. Simultaneous measurements of O-1(2) phosphorescence kinetics, triplet-triplet transient absorption, and delayed fluorescence have provided additional information about the phenomenon. It is proposed that TPrPo shows a singlet oxygen-sensitized delayed fluorescence which extends to near-infrared where it is strong enough to override the phosphorescence emission. Tetra-propyl-porphycene (TPrPo) in solution has been studied by means of time-and spectral-resolved near-infrared (NIR) luminescence spectroscopy. The NIR luminescence kinetics exhibits surprising dependence on oxygen concentration. There is a clearly visible long-lived (microsecond range) rise-section in biexponential kinetics at broad NIR spectral range of 800-1100 nm for lowered oxygen concentrations. The rise-section is not present in nitrogen-saturated samples and it also disappears after addition of singlet oxygen (O-1(2)) physical quencher DABCO, which means that the effect is O-1(2)-mediated. Kinetics of TPrPo delayed fluorescence detected around 650 nm possess a similar rise-decay character in microsecond range. Simultaneous measurements of O-1(2) phosphorescence kinetics, triplet-triplet transient absorption, and delayed fluorescence have provided additional information about the phenomenon. It is proposed that TPrPo shows a singlet oxygen-sensitized delayed fluorescence which extends to near-infrared where it is strong enough to override the phosphorescence emission. (en)
Title	Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics (en)
skos:prefLabel	Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics (en)
skos:notation	RIV/00216208:11320/13:10173449!RIV14-GA0-11320___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(GD202/09/H041), S
http://linked.open...iv/cisloPeriodika	July 2013
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Dědic, Roman Hála, Jan Scholz, Marek
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	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	95103
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10173449
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Rise-decay kinetics; Delayed fluorescence; Phosphorescence; Singlet oxygen; Porphyrin; Porphycene (en)
http://linked.open.../riv/klicoveSlovo	Delayed fluorescence Porphycene Rise-decay kinetics Phosphorescence Singlet oxygen Porphyrin
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[B3AB12F9BA2F]
http://linked.open...i/riv/nazevZdroje	Journal of Molecular Structure
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Physics of nanostructures
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	1044
http://linked.open...iv/tvurceVysledku	Dědic, Roman Hála, Jan Nonell, Santi Scholz, Marek
http://linked.open...ain/vavai/riv/wos	000320635200046
issn	0022-2860
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.molstruc.2012.12.029
http://localhost/t...ganizacniJednotka	11320

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