Výzkum IČ vibračních pásů C-O vazby v karbonylových komplexech Cu+ MFI zeolitů.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F04%3A00001327" target="_blank" >RIV/00216275:25310/04:00001327 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites.

Popis výsledku v původním jazyce

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 monocarbonylband 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 dif

Název v anglickém jazyce

Investigation of IR Vibrational Band of C-O Bond of Carbonyl Species in Cu+-MFI Zeolites.

Popis výsledku anglicky

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 monocarbonylband 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 dif

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Phys. Chem. Chem. Phys.

ISSN

1463-9076

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

4208-4214

Kód UT WoS článku

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EID výsledku v databázi Scopus

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