dc.contributor.author |
Kournoutas, Fotis
|
cze |
dc.contributor.author |
Kalis, Ioannis Konstantinos
|
cze |
dc.contributor.author |
Fecková, Michaela
|
cze |
dc.contributor.author |
Achelle, Sylvain
|
cze |
dc.contributor.author |
Fakis, Mihalis
|
cze |
dc.date.accessioned |
2021-05-15T18:22:35Z |
|
dc.date.available |
2021-05-15T18:22:35Z |
|
dc.date.issued |
2020 |
eng |
dc.identifier.issn |
1010-6030 |
eng |
dc.identifier.uri |
https://hdl.handle.net/10195/77095 |
|
dc.description.abstract |
The effect of protonation on the photophysics and especially on the excited state dynamics of two pyrimidine chromophores, bearing the A-(pi-D)(2) and A-(pi-D)(3) structure, is studied by means of fs-ps and ns time resolved fluorescence spectroscopy. Three different acids, namely camphorsulphonic (CSA), acetic (AcOH) and trifluoroacetic acid (TFA) were used. The chromophores bear the pyrimidine electron deficient heterocycle as electron-withdrawing group, used as protonation site, as well as diphenylamino electron donors. Protonation is revealed through the emergence of red-shifted absorption and fluorescence bands accompanied by a quenching of the fluorescence of the neutral molecules. Time-resolved dynamics reveal that protonation with CSA and TFA do not influence the excited state lifetime of the chromophores, pointing to a static quenching process. On the other hand, the lifetime is decreased upon protonation with AcOH. Further investigation based on the Stern-Vollmer plots showed that addition of AcOH leads to both dynamic and static quenching. |
eng |
dc.format |
"112398-1"-"112398-7" |
eng |
dc.language.iso |
eng |
eng |
dc.publisher |
Elsevier Science SA |
eng |
dc.relation.ispartof |
Journal of Photochemistry and Photobiology A-Chemistry, volume 391, issue: March |
eng |
dc.rights |
pouze v rámci univerzity |
cze |
dc.subject |
pyrimidine chromophores |
eng |
dc.subject |
protonation |
eng |
dc.subject |
dynamics |
eng |
dc.subject |
fluorescence spectroscopy |
eng |
dc.subject |
pyrimidinové chromofory |
cze |
dc.subject |
protonace |
cze |
dc.subject |
dynamika |
cze |
dc.subject |
fluorescenční spektroskopie |
cze |
dc.title |
The effect of protonation on the excited state dynamics of pyrimidine chromophores |
eng |
dc.title.alternative |
Efekt protonace na dynamiku excitovaného stavu pyrimidinových chromoforů |
cze |
dc.type |
article |
eng |
dc.description.abstract-translated |
Byl studován efekt protonace na fotofyziku dvou pyrimidinových chromoforů prostřednictvím fluorescenční spektroskopie. Byly využity tři kyseliny, kafrsulfonová, octová a trifluoroctová. |
cze |
dc.peerreviewed |
yes |
eng |
dc.publicationstatus |
published version |
eng |
dc.identifier.doi |
10.1016/j.jphotochem.2020.112398 |
eng |
dc.relation.publisherversion |
https://www.sciencedirect.com/science/article/abs/pii/S1010603019318799 |
eng |
dc.project.ID |
SGS_2020_004/Výzkum a vývoj nových organických materiálů ? od syntézy a charakterizace k jejich potenciálnímu použití a bezpečnému zacházení s nimi. |
eng |
dc.identifier.wos |
000514008000032 |
eng |
dc.identifier.scopus |
2-s2.0-85078190561 |
|
dc.identifier.obd |
39884863 |
eng |