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Statements

Subject Item
n2:RIV%2F62690094%3A18440%2F07%3A00001913%21RIV07-GA0-18440___
rdf:type
n7:Vysledek skos:Concept
dcterms:description
The time dependence of the anisotropy of fluorescence after an impulsive excitation in the molecular ring (resembling the B850 ring of the purple bacterium Rhodopseudomonas acidophila) is calculated. Fast fluctuations of the environment are simulated by dynamic disorder and slow fluctuations by uncorrelated static disorder. Without dynamic disorder modest degrees of static disorder are sufficient to cause the experimentally found initial drop of the anisotropy on a sub-100 fs time scale. In the present investigation we are comparing results for the time-dependent optical anisotropy of the molecular ring for four models of the uncorrelated static disorder: Gaussian disorder in the local energies (model A), Gaussian disorder in the transfer integrals (model B), Gaussian disorder in radial positions of molecules (model C) and Gaussian disorder in angular positions of molecules (model D). Both types of disorder-static and dynamic-are taken into account simultaneously. Bylo zkoumáno rozdělení energetické separace E(k=+-1) a relativní orientace dipólových momentů v prstenci B850 z purpurové bakterie Rhodopseudomonas acidophila. Byly porovnány čtyři typy nekorelovaného statického nepořádku: (A) Gaussovský nepořádek v lokálních excitačních energiích, (B) Gaussovský nepořádek v transfer integrálech, (C) Gaussovský nepořádek v radiálních posicích molekul, (D) Gaussovský nepořádek v úhlových posicích molekul. Je zahrnuta též možná eliptická deformace prstence. Naše výsledky jsou korelovány s dostupnými experimentálními daty [C. Hofmann et. al., Chem. Phys. Lett. 395 (2004) 373]. The time dependence of the anisotropy of fluorescence after an impulsive excitation in the molecular ring (resembling the B850 ring of the purple bacterium Rhodopseudomonas acidophila) is calculated. Fast fluctuations of the environment are simulated by dynamic disorder and slow fluctuations by uncorrelated static disorder. Without dynamic disorder modest degrees of static disorder are sufficient to cause the experimentally found initial drop of the anisotropy on a sub-100 fs time scale. In the present investigation we are comparing results for the time-dependent optical anisotropy of the molecular ring for four models of the uncorrelated static disorder: Gaussian disorder in the local energies (model A), Gaussian disorder in the transfer integrals (model B), Gaussian disorder in radial positions of molecules (model C) and Gaussian disorder in angular positions of molecules (model D). Both types of disorder-static and dynamic-are taken into account simultaneously.
dcterms:title
Teplotní závislost anizotropie fluorescence v prstencových molekulárních systémech Temperature dependence of the anisotropy of fluorescence in ring molecular systems Temperature dependence of the anisotropy of fluorescence in ring molecular systems
skos:prefLabel
Temperature dependence of the anisotropy of fluorescence in ring molecular systems Teplotní závislost anizotropie fluorescence v prstencových molekulárních systémech Temperature dependence of the anisotropy of fluorescence in ring molecular systems
skos:notation
RIV/62690094:18440/07:00001913!RIV07-GA0-18440___
n4:strany
558-561
n4:aktivita
n12:P
n4:aktivity
P(GA202/03/0817)
n4:cisloPeriodika
1-4
n4:dodaniDat
n11:2007
n4:domaciTvurceVysledku
n8:3268721
n4:druhVysledku
n13:J
n4:duvernostUdaju
n15:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
454486
n4:idVysledku
RIV/62690094:18440/07:00001913
n4:jazykVysledku
n9:eng
n4:klicovaSlova
Exciton transfer; Density matrix theory; Fluorescence
n4:klicoveSlovo
n10:Fluorescence n10:Density%20matrix%20theory n10:Exciton%20transfer
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[A8CAA34630BA]
n4:nazevZdroje
Journal of Luminescence
n4:obor
n18:BE
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
2
n4:projekt
n16:GA202%2F03%2F0817
n4:rokUplatneniVysledku
n11:2007
n4:svazekPeriodika
122-123
n4:tvurceVysledku
Heřman, Pavel Barvík, Ivan
s:issn
0022-2321
s:numberOfPages
4
n14:organizacniJednotka
18440