Singlet oxygen-sensitized delayed fluorescence of common water-soluble photosensitizers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10173451" target="_blank" >RIV/00216208:11320/13:10173451 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c3pp50170a" target="_blank" >http://dx.doi.org/10.1039/c3pp50170a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c3pp50170a" target="_blank" >10.1039/c3pp50170a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Singlet oxygen-sensitized delayed fluorescence of common water-soluble photosensitizers

Popis výsledku v původním jazyce

Six singlet oxygen (1O2) photosensitizers (PS) - 5,10,15,20-tetrakis(1-methyl-4-pyridinio) porphine (TMPyP), meso-tetrakis(4-sulfonathophenyl)porphine (TPPS4), Al(III) phthalocyanine chloride tetrasulfonic acid (AlPcS4), eosin Y, rose bengal, and methylene blue - were investigated in terms of their ability to produce delayed fluorescence (DF) in solutions at room temperature. All the PS dissolved in air-saturated phosphate buffered saline ( pH 7.4) exhibit detectable DF, which can be quenched by 10 mM NaN3, a specific 1O2 quencher. The DF kinetics has a biexponential rise-decay character in a microsecond time domain. Therefore, singlet oxygen-sensitized delayed fluorescence (SOSDF), where the triplet state of PS reacts with 1O2 giving rise to an excited singlet state of PS, is the prevailing mechanism. It was confirmed by a monoexponential decay of triplet-triplet transient absorption kinetics, dependence of SOSDF kinetics on oxygen concentration, absence of SOSDF in nitrogen-saturated

Název v anglickém jazyce

Singlet oxygen-sensitized delayed fluorescence of common water-soluble photosensitizers

Popis výsledku anglicky

Six singlet oxygen (1O2) photosensitizers (PS) - 5,10,15,20-tetrakis(1-methyl-4-pyridinio) porphine (TMPyP), meso-tetrakis(4-sulfonathophenyl)porphine (TPPS4), Al(III) phthalocyanine chloride tetrasulfonic acid (AlPcS4), eosin Y, rose bengal, and methylene blue - were investigated in terms of their ability to produce delayed fluorescence (DF) in solutions at room temperature. All the PS dissolved in air-saturated phosphate buffered saline ( pH 7.4) exhibit detectable DF, which can be quenched by 10 mM NaN3, a specific 1O2 quencher. The DF kinetics has a biexponential rise-decay character in a microsecond time domain. Therefore, singlet oxygen-sensitized delayed fluorescence (SOSDF), where the triplet state of PS reacts with 1O2 giving rise to an excited singlet state of PS, is the prevailing mechanism. It was confirmed by a monoexponential decay of triplet-triplet transient absorption kinetics, dependence of SOSDF kinetics on oxygen concentration, absence of SOSDF in nitrogen-saturated

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GBP501%2F12%2FG055" target="_blank" >GBP501/12/G055: Centrum fotosyntetického výzkumu</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Photochemical and Photobiological Sciences

ISSN

1474-905X

e-ISSN

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Svazek periodika

12

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

1873-1884

Kód UT WoS článku

000324890300015

EID výsledku v databázi Scopus

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