About: Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol.

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About: Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol. Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	H-beta zeolites differing in removal of the template by calcination in an oxygen or in a stream of ammonia, and in their subsequent steam treatment at various temperatures, as well as beta zeolites exchanged with alkaline metal ions, were investigated in the MPV reduction of 4-tert-butyl cyclohexanone to 4-tert-butyl hexanol using isopropanol. FTIR of the OH groups, of the C=N groups of adsorbed d(3)-acetonitrile, and of the framework T-O-T antisymmetric mode was used to estimate the concentration of the individual Al-Lewis sites. XPS was employed to monitor the migration of the Al species into the surface layers of the zeolite crystals. The VHF band at 3780 cm(-1) and skeletal T-O-T bands at 901, 890, and 882 cm-1 were found for steam-treated (ST) H-beta. Both alkali metal ion exchange and treatment of zeolite by gaseous ammonia annihilated the bands at 3780 and 882 cm-1, but the bands at 901 and 890 cm-1 (siloxane bridges) were retained. While the bands at 3780 and 882 cm-1. H-beta zeolites differing in removal of the template by calcination in an oxygen or in a stream of ammonia, and in their subsequent steam treatment at various temperatures, as well as beta zeolites exchanged with alkaline metal ions, were investigated in the MPV reduction of 4-tert-butyl cyclohexanone to 4-tert-butyl hexanol using isopropanol. FTIR of the OH groups, of the C=N groups of adsorbed d(3)-acetonitrile, and of the framework T-O-T antisymmetric mode was used to estimate the concentration of the individual Al-Lewis sites. XPS was employed to monitor the migration of the Al species into the surface layers of the zeolite crystals. The VHF band at 3780 cm(-1) and skeletal T-O-T bands at 901, 890, and 882 cm-1 were found for steam-treated (ST) H-beta. Both alkali metal ion exchange and treatment of zeolite by gaseous ammonia annihilated the bands at 3780 and 882 cm-1, but the bands at 901 and 890 cm-1 (siloxane bridges) were retained. While the bands at 3780 and 882 cm-1. (en)
Title	Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol. Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol. (en)
skos:prefLabel	Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol. Structure of Al-Lewis Site in Beta Zeolite Active in Meerwein-Ponndorf-Verley Reduction of Ketone to Alcohol. (en)
skos:notation	RIV/61388955:_____/02:54020175!RIV/2003/AV0/A54003/N
http://linked.open.../vavai/riv/strany	171;182
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IBS4040015), Z(AV0Z4040901)
http://linked.open...iv/cisloPeriodika	N/A
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Wichterlová, Blanka Sobalík, Zdeněk Bastl, Zdeněk
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	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	665474
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/02:54020175
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Meerwein-Ponndorf-Verley reduction; beta zeolite; Lewis acid (en)
http://linked.open.../riv/klicoveSlovo	Lewis acid Meerwein-Ponndorf-Verley reduction beta zeolite
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[F9FD3C2DCA42]
http://linked.open...i/riv/nazevZdroje	Journal of Catalysis
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Synthesis of molecular sieves for hydrocarbons transformation
http://linked.open...UplatneniVysledku	2002
http://linked.open...v/svazekPeriodika	210
http://linked.open...iv/tvurceVysledku	Sobalík, Zdeněk Wichterlová, Blanka Bortnovsky, O. Bastl, Zdeněk
http://linked.open...n/vavai/riv/zamer	Objasňování zákonitostí vztahů struktury a vlastností - zejména dynamiky a chemické reaktivity - látek a molekulárních systémů
issn	0021-9517
number of pages	12 (xsd:int)

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