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Infrared spectroscopic and thermodynamic assessment of extraframework cationic adsorption sites in the zeolite K-L by using CO as probe molecule
Authors: Delgado Montserrat R. | Martinez De Yuso Alicia | Bulánek Roman | Arean Carlos O.
Year: 2015
Type of publication: článek v odborném periodiku
Name of source: Chemical Physics Letters
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 195-198
Titles:
Language Name Abstract Keywords
cze Infračervená spektroskopie a termodynamické hodnocení mimomřížkových kationtových adsorpčních center v zeolitu K-L pomocí CO jako testovací molekuly Infračervená spektroskopie byla využita pro charakterizaci rozdílných adsorpčních center v zeolitu K-L. Jako testovací molekula byl zvolen oxid uhelnatý. Byly nalezeny dva typy poloh odpovídající CO adsorpčním komplexům. CO; heterogenní katalýza; FTIR; adsorpce; zeolit
eng Infrared spectroscopic and thermodynamic assessment of extraframework cationic adsorption sites in the zeolite K-L by using CO as probe molecule Zeolites are often used as the host material for holding and organizing adsorbed molecules and supramolecular species inside their void channels and cages, in order to exploit space confinement and host-guest interaction for engineering composite materials having novel electronic and optical properties. That endeavour would benefit from improved knowledge about the type and strength of the zeolite adsorption sites. To this end, variable temperature infrared spectroscopy (a technique capable of giving simultaneous information on the type and strength of gas-adsorption complexes) was used herein to characterize the zeolite K-L by means of adsorbed CO. Two types of cationic adsorption sites (termed D' and D '') were found on the wall of the zeolite main channel; formation of the corresponding CO adsorption complexes was found to involve a standard enthalpy change of -23.4 and -26.7 kJ mol(-1), respectively. carbon-monoxide; heterogeneous catalysis; FTIR; adsorption; zeolite

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