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Homogeneous OH groups in dealuminated HY zeolite studied by IR spectroscopy

Homogeneous OH groups in dealuminated HY zeolite ...

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dc.contributor.author Datka, Jerzy [SAP11003748] pl
dc.contributor.author Gil, Barbara [SAP11016267] pl
dc.contributor.author Domagała, Teresa pl
dc.contributor.author Góra-Marek, Kinga [SAP11018751] pl
dc.date.accessioned 2015-09-25T11:36:24Z
dc.date.available 2015-09-25T11:36:24Z
dc.date.issued 2001 pl
dc.identifier.issn 1387-1811 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/15796
dc.language eng pl
dc.title Homogeneous OH groups in dealuminated HY zeolite studied by IR spectroscopy pl
dc.type JournalArticle pl
dc.description.physical 61-66 pl
dc.abstract.en The analysis of IR spectra of free OH groups in strongly dealuminated zeolite HY (Si/Al ≅ 100) restoring on desorption of ammonia or pyridine provides spectroscopic evidence for the homogeneity of SiO1HAl groups. The same conclusion is obtained by analysis of the IR spectra of OH and OD groups interacting (by hydrogen-bonding) with nitrogen at 170 K. The homogeneity of OH groups in strongly dealuminated HY is explained by the presence of only (SiO)3SiO1HAl(OSi)3 groups. By contrast, heterogeneous OH groups are found in non-dealuminated HY (Si/Al=2.56) containing three kinds of OH groups of various acid strength: (SiO)(AlO)2SiO1HAl(OSi)3, (SiO)2(AlO)SiO1HAl(OSi)3 and (SiO)3SiO1HAl(OSi)3. Our dealuminated sample is the only known example of a zeolite with strongly acidic homogeneous hydroxyls. It may be a model catalyst for strongly acidic homogeneous OH groups or a model system for spectroscopic studies (IR, NMR etc.). pl
dc.subject.en IR spectroscopy pl
dc.subject.en zeolites pl
dc.subject.en OH groups pl
dc.subject.en homogeneity pl
dc.description.volume 47 pl
dc.description.number 1 pl
dc.identifier.doi 10.1016/S1387-1811(01)00314-6 pl
dc.identifier.eissn 1873-3093 pl
dc.title.journal Microporous and Mesoporous Materials pl
dc.language.container eng pl
dc.affiliation Wydział Chemii : Zakład Chemii Nieorganicznej pl
dc.subtype Article pl


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