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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F02%3A54020175" target="_blank" >RIV/61388955:_____/02:54020175 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language 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 inthe 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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

<a href="/en/project/IBS4040015" target="_blank" >IBS4040015: Synthesis of molecular sieves for hydrocarbons transformation</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

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

Name of the periodical

Journal of Catalysis

ISSN

0021-9517

e-ISSN

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Volume of the periodical

210

Issue of the periodical within the volume

N/A

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

171-182

UT code for WoS article

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EID of the result in the Scopus database

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