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| Description
| - We explored the time-dependent Stokes shifts of fluorescent dyes containing an anthroyloxy chromophore (2-AS, 9-AS, and 16-AP) in bilayers composed of palmitoyl-oleoyl-phosphatidylcholine. The obtained data revealed a nontrivial solvation response of these dyes, which are located in the backbone region of the bilayer with a gradually increasing depth. For comparison, steady-state emission spectra in the neat solvents of various polarities and viscosities were also recorded. The results indicate that on the short picosecond time scale the AS dyes undergo complex photophysics including formation of states with a charge-transfer character. This observation is supported by ab initio calculations of the excited states of 9-methylanthroate. The slower nanosecond part of the relaxation process can be attributed to the solvation response of the dyes. A slowdown in solvent relaxation is observed upon moving toward the center of the bilayer.
- We explored the time-dependent Stokes shifts of fluorescent dyes containing an anthroyloxy chromophore (2-AS, 9-AS, and 16-AP) in bilayers composed of palmitoyl-oleoyl-phosphatidylcholine. The obtained data revealed a nontrivial solvation response of these dyes, which are located in the backbone region of the bilayer with a gradually increasing depth. For comparison, steady-state emission spectra in the neat solvents of various polarities and viscosities were also recorded. The results indicate that on the short picosecond time scale the AS dyes undergo complex photophysics including formation of states with a charge-transfer character. This observation is supported by ab initio calculations of the excited states of 9-methylanthroate. The slower nanosecond part of the relaxation process can be attributed to the solvation response of the dyes. A slowdown in solvent relaxation is observed upon moving toward the center of the bilayer. (en)
- Zkoumali jsme časově závislý Stokesův posuv fluorescenčních značek obsahujících anthroyloxový chromofor (2-AS, 9-AS, and 16-AP) ve dvojvrstvách tvořených palmitoyl-oleoyl-phosphatidylcholinem (POPC). Solvatační odpověď těchto značek, které jsou umístěny v různých místech nepolární oblasti membrány, je značně složitá. Výsledky ukazují, že na krátké pikosekundové časové škále podstupují AS-značky řadu fotofyzikálních procesů včetně tvorby stavů s částečným přenosem náboje. Tato pozorování byla potvrzena ab initio výpočty pro excitovaný stav 9-methylanthroatu. Pomalejší nanosekundová část relaxačního procesu můze být přiřazena k solvatační odpovědi značky. Relaxace rozpouštědla se zpomaluje s hlubším umístěním značky směrem ke středu membrány. (cs)
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| Title
| - Time-dependent stokes shifts of fluorescent dyes in the hydrophobic backbone region of a phospholipid bilayer: Combination of fluorescence spectroscopy and ab initio calculations
- Časově závislý Stokesův posuv fluorescenčních značek v hydrofobní oblasti fosfolipidových membrán: kombinace fluorescenční spektroskopie a ab initio výpočtů (cs)
- Time-dependent stokes shifts of fluorescent dyes in the hydrophobic backbone region of a phospholipid bilayer: Combination of fluorescence spectroscopy and ab initio calculations (en)
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| skos:prefLabel
| - Time-dependent stokes shifts of fluorescent dyes in the hydrophobic backbone region of a phospholipid bilayer: Combination of fluorescence spectroscopy and ab initio calculations
- Časově závislý Stokesův posuv fluorescenčních značek v hydrofobní oblasti fosfolipidových membrán: kombinace fluorescenční spektroskopie a ab initio výpočtů (cs)
- Time-dependent stokes shifts of fluorescent dyes in the hydrophobic backbone region of a phospholipid bilayer: Combination of fluorescence spectroscopy and ab initio calculations (en)
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| skos:notation
| - RIV/61388963:_____/07:00084819!RIV08-AV0-61388963
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GP203/07/P449), P(IAA400400503), P(LC06063), P(LC512), Z(AV0Z40400503), Z(AV0Z40550506)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61388963:_____/07:00084819
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - solvation dynamics; solvent relaxation; 9-anthroid acid; preferential solvation (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Journal of Physical Chemistry B
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Hof, Martin
- Jungwirth, Pavel
- Sýkora, Jan
- Slavíček, Petr
- Barucha, Justyna
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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