About: Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A study of excited-state dynamics of water-soluble carbonyl carotenoids, crocin, norbixin, and astalysine in solvents with different polarity. While no polarity effects were observed in 2-propanol and methanol, polarity-induced lifetime shortening has been detected in water. For crocin and astalysine the S1 lifetime decreases from 135 ps to 61 ps (crocin), and from 4 ps to 2.2 ps (astalysine) when going from methanol to water. The S1 lifetime of norbixin is within the 15-18 ps range in all solvents, an effect attributed to its carboxylic group, which isolates the carbonyl group from the rest of conjugation. No spectral bands attributable to the intramolecular charge transfer (ICT) state have been found in any transient absorption spectra. The ICT-Sn transition is made forbidden, we suggest, by the symmetric location of the conjugated carbonyl groups. In astalysine, we have found a clear signature of the S* state with a life-time of 7 ps (methanol) and 6.1 ps (water). A study of excited-state dynamics of water-soluble carbonyl carotenoids, crocin, norbixin, and astalysine in solvents with different polarity. While no polarity effects were observed in 2-propanol and methanol, polarity-induced lifetime shortening has been detected in water. For crocin and astalysine the S1 lifetime decreases from 135 ps to 61 ps (crocin), and from 4 ps to 2.2 ps (astalysine) when going from methanol to water. The S1 lifetime of norbixin is within the 15-18 ps range in all solvents, an effect attributed to its carboxylic group, which isolates the carbonyl group from the rest of conjugation. No spectral bands attributable to the intramolecular charge transfer (ICT) state have been found in any transient absorption spectra. The ICT-Sn transition is made forbidden, we suggest, by the symmetric location of the conjugated carbonyl groups. In astalysine, we have found a clear signature of the S* state with a life-time of 7 ps (methanol) and 6.1 ps (water). (en)
Title	Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents (en)
skos:prefLabel	Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents (en)
skos:notation	RIV/60077344:_____/10:00355284!RIV12-AV0-60077344
http://linked.open...avai/riv/aktivita	I P S Z
http://linked.open...avai/riv/aktivity	I, P(GA202/09/1330), S, Z(AV0Z50510513), Z(MSM6007665808)
http://linked.open...iv/cisloPeriodika	1-2
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Polívka, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Biologické centrum AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	294185
http://linked.open...ai/riv/idVysledku	RIV/60077344:_____/10:00355284
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	hydrophilic carotenoids; excited-state dynamics; charge-transfer state (en)
http://linked.open.../riv/klicoveSlovo	charge-transfer state excited-state dynamics hydrophilic carotenoids
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[691A83E18737]
http://linked.open...i/riv/nazevZdroje	Chemical Physics
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Excited state properties of carotenoid aggregates
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	373
http://linked.open...iv/tvurceVysledku	Chábera, P. Fuciman, M. Polívka, Tomáš Naqvi, K. R.
http://linked.open...ain/vavai/riv/wos	000280065100010
http://linked.open...n/vavai/riv/zamer	Výzkum struktury genetické informace rostlin a jejich patogenů na molekulární úrovni, indukce a analýza cílených změn genomu a plastomu a studium fotosyntetických procesů a projevů dědičnosti v interakci s prostředím a patogeny Fyzikální biologie -nové přístupy v biologickém výzkumu
issn	0301-0104
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.chemphys.2010.01.007
is http://linked.open...avai/riv/vysledek of	Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents

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