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| Description
| - Tautomers of 1-methylcytosine that are protonated at N-3(1+) and C-5(2+) have been specifically synthesized in the gas phase and characterized by tandem mass spectrometry and quantum chemical calculation. Ion 1+ is the most stable tautomer in aqueous and methanol solution and is likely to be formed by electrospray ionization of 1-methylcytosine and transferred in the gas phase. Gas-phase protonation of 1-methylcytosine produces a mixture of 1+ and the O-2-protonated tautomer (3+), which are nearly isoenergetic. Dissociative ionization of 6-ethyl-5,6-dihydro-1-methylcytosine selectively forms isomer 2+. Upon collisional activation, ions 1+ and 3+ dissociate by loss of ammonia and [C,H,N,O], whose mechanis,s have been established by deuterium labeling and ab initio calculations. The main dissociations of 2+ following collisional activation are losses CH2=C=NH and HN=C=O.
- Tautomers of 1-methylcytosine that are protonated at N-3(1+) and C-5(2+) have been specifically synthesized in the gas phase and characterized by tandem mass spectrometry and quantum chemical calculation. Ion 1+ is the most stable tautomer in aqueous and methanol solution and is likely to be formed by electrospray ionization of 1-methylcytosine and transferred in the gas phase. Gas-phase protonation of 1-methylcytosine produces a mixture of 1+ and the O-2-protonated tautomer (3+), which are nearly isoenergetic. Dissociative ionization of 6-ethyl-5,6-dihydro-1-methylcytosine selectively forms isomer 2+. Upon collisional activation, ions 1+ and 3+ dissociate by loss of ammonia and [C,H,N,O], whose mechanis,s have been established by deuterium labeling and ab initio calculations. The main dissociations of 2+ following collisional activation are losses CH2=C=NH and HN=C=O. (en)
- Tautomery 1-methylcytosinu protonovaného v poloze N-3 (1+•) a C-5 (2+•) byly specificky připraveny v plynné fázi a charakterizovány pomocí tandemové hmotnostní spektrometrie a kvantově chemických výpočtů. Ion 1+• je nejstabilnějším tautomerem ve vodném a methanolickém roztoku a je tvořen při ionizaci 1-methylcytosinu elektrosprejem. Protonací 1-methylcytosinu v plynné fázi vzniká směs 1+• a O-2 protonovaného tautomeru (3+•), které jsou téměř isoenergetické. Disociativní ionizace 6-ethyl-5,6-dihydro-1-methylcytosinu poskytuje selektivně isomer 2+•. Při kolizní aktivaci ionty 1+• a 2+• disociují ztrátami amoniaku a [C,H,N,O], jejichž mechanizmy byly studovány pomocí izotopického značení deuteriem a ab initio výpočtů. Hlavními disociacemi kolizně aktivovaných iontů 2+• jsou ztráty CH2=C=NH a HN=C=O. Mechanizmy těchto reakcí byly objasněny izotopickým značením a teoretickými výpočty. (cs)
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| Title
| - Gas-phase tautomers of protonated 1-methylcytosine. Preparation, energetics, and dissociation mechanisms
- Tautomery protonovaného 1-methylcytosinu v plynné fázi. Příprava, energetika a disociační mechanizmy (cs)
- Gas-phase tautomers of protonated 1-methylcytosine. Preparation, energetics, and dissociation mechanisms (en)
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| skos:prefLabel
| - Gas-phase tautomers of protonated 1-methylcytosine. Preparation, energetics, and dissociation mechanisms
- Tautomery protonovaného 1-methylcytosinu v plynné fázi. Příprava, energetika a disociační mechanizmy (cs)
- Gas-phase tautomers of protonated 1-methylcytosine. Preparation, energetics, and dissociation mechanisms (en)
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| skos:notation
| - RIV/61388955:_____/05:00023555!RIV06-AV0-61388955
|
| 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(GA203/02/0737), P(IAA400400502), Z(AV0Z40400503)
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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
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/05:00023555
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - nucleobases; cytosine; tandem mass spectrometry; ab initio calculations (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Journal of Mass Spectrometry
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Polášek, Miroslav
- Tureček, F.
- Cuadrado-Peinado, M. L.
- Yao, Ch.
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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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