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| Description
| - Interaction of CO molecules with Cu-MFI zeolites reduced in vacuum or CO atmosphere was investigated. The character of the absorption bands ascribed to intrazeolitic carbonyl species was explored in the dependence on the Cu loading, Si/Al ratio, degree of reduction and on the coverage of the Cu+ ions by CO molecules. The different character of individual Cu sites revealed in the IR spectra of carbonyl species upon CO pressure. Some Cu ions are not able to form dicarbonyl species even at 7.5 kPa of CO. The band of residual monocarbonyl species strongly overlaps with the band of asymmetric vibration of dicarbonyl species, making the quantitative analysis of this band rather difficult. It was found that the position and the half-width of the monocarbonyl band as well as the third and fourth statistical moment of the band are independent on the variable factors mentioned above. The main vibrational band of monocarbonyl species cannot be deconvoluted to individual bands corresponding to different Cu exchan
- Interaction of CO molecules with Cu-MFI zeolites reduced in vacuum or CO atmosphere was investigated. The character of the absorption bands ascribed to intrazeolitic carbonyl species was explored in the dependence on the Cu loading, Si/Al ratio, degree of reduction and on the coverage of the Cu+ ions by CO molecules. The different character of individual Cu sites revealed in the IR spectra of carbonyl species upon CO pressure. Some Cu ions are not able to form dicarbonyl species even at 7.5 kPa of CO. The band of residual monocarbonyl species strongly overlaps with the band of asymmetric vibration of dicarbonyl species, making the quantitative analysis of this band rather difficult. It was found that the position and the half-width of the monocarbonyl band as well as the third and fourth statistical moment of the band are independent on the variable factors mentioned above. The main vibrational band of monocarbonyl species cannot be deconvoluted to individual bands corresponding to different Cu exchan (en)
- Byla studována interakce CO molekuly s Cu-MFI zeolity redukovanými ve vakuu nebo v atmosféře CO. Charakter absorpčních pásů přiřazených karbonylovým částicím byl studován v závislosti na obsahu Cu, Si/Al poměru, stupni redukce a na pokrytí Cu+ iontů molekulami CO. Odlišnosti v jednotlivých Cu centrech se projevili v IČ spektrech karbonylových komplexů za různých tlaků CO. Některá centra mědi nejsou schopna vytvořit dikarbonylovou částici ani za tlaku 7.5 kPa CO. Zbývající monokarbonylový pás je silně překrytý pásem asymetrické vibrace dikarbonylu, což činí kvantitativní analýzu obtížnou. Dále bylo zjištěno, že pozice monokarbonylového pásu, stejně tak jako pološířka, třetí a čtvrtý statistický moment tohoto pásu nejsou závislé na změnách faktorů zmiňovaných výše. Hlavní pás monokarbonylu nelze rozložit na více spektrálních pásů odpovídajících jednotlivým Cu centrům. To znamená, že IČ spektroskopie není vhodnou experimentální metodou pro sledování jednotlivých Cu center v ZSM-5 zeolitu. Navíc nebyla (cs)
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| Title
| - Výzkum IČ vibračních pásů C-O vazby v karbonylových komplexech Cu+ MFI zeolitů. (cs)
- Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites.
- Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites. (en)
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| skos:prefLabel
| - Výzkum IČ vibračních pásů C-O vazby v karbonylových komplexech Cu+ MFI zeolitů. (cs)
- Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites.
- Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites. (en)
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| skos:notation
| - RIV/00216275:25310/04:00001327!RIV08-MSM-25310___
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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
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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/00216275:25310/04:00001327
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - IR spectroscopy; ion-exchanged ZSM-5; high-silica zeolites; Cu-MFI zeolites (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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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
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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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| http://localhost/t...ganizacniJednotka
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