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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10173449%21RIV14-GA0-11320___
rdf:type
n15:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.molstruc.2012.12.029
dcterms: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.
dcterms:title
Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics
skos:prefLabel
Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics Oxygen effects on tetrapropylporphycene near-infrared luminescence kinetics
skos:notation
RIV/00216208:11320/13:10173449!RIV14-GA0-11320___
n15:predkladatel
n17:orjk%3A11320
n6:aktivita
n8:S n8:P
n6:aktivity
P(GD202/09/H041), S
n6:cisloPeriodika
July 2013
n6:dodaniDat
n16:2014
n6:domaciTvurceVysledku
n9:1133268 n9:8071446 n9:9749713
n6:druhVysledku
n11:J
n6:duvernostUdaju
n20:S
n6:entitaPredkladatele
n10:predkladatel
n6:idSjednocenehoVysledku
95103
n6:idVysledku
RIV/00216208:11320/13:10173449
n6:jazykVysledku
n13:eng
n6:klicovaSlova
Rise-decay kinetics; Delayed fluorescence; Phosphorescence; Singlet oxygen; Porphyrin; Porphycene
n6:klicoveSlovo
n12:Delayed%20fluorescence n12:Phosphorescence n12:Porphycene n12:Rise-decay%20kinetics n12:Porphyrin n12:Singlet%20oxygen
n6:kodStatuVydavatele
NL - Nizozemsko
n6:kontrolniKodProRIV
[B3AB12F9BA2F]
n6:nazevZdroje
Journal of Molecular Structure
n6:obor
n7:BO
n6:pocetDomacichTvurcuVysledku
3
n6:pocetTvurcuVysledku
4
n6:projekt
n18:GD202%2F09%2FH041
n6:rokUplatneniVysledku
n16:2013
n6:svazekPeriodika
1044
n6:tvurceVysledku
Hála, Jan Dědic, Roman Scholz, Marek Nonell, Santi
n6:wos
000320635200046
s:issn
0022-2860
s:numberOfPages
5
n19:doi
10.1016/j.molstruc.2012.12.029
n14:organizacniJednotka
11320