Jagiellonian University Repository
Homogeneous OH groups in dealuminated HY zeolite studied by IR spectroscopy
Communities & Collections
pcg.skipToMenu
Homogeneous OH groups in dealuminated HY zeolite studied by IR spectroscopy
Bibliographic description
| title: | Homogeneous OH groups in dealuminated HY zeolite studied by IR spectroscopy |
| author: | Datka Jerzy  , Gil Barbara , Domagała Teresa, Góra-Marek Kinga
|
| journal title: | Microporous and Mesoporous Materials |
| volume: | 47 |
| issue: | 1 |
| date of publication : | 2001 |
| pages: | 61-66 |
| ISSN: |
1387-1811 |
| eISSN: |
1873-3093 |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | The analysis of IR spectra of free OH groups in strongly dealuminated zeolite HY (Si/Al $\cong$ 100) restoring on desorption of ammonia or pyridine provides spectroscopic evidence for the homogeneity of $SiO_{1}HAl$ 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 $(SiO)_{3}SiO_{1}HAl(OSi)_{3}$ 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: $(SiO)(AlO)_{2}SiO_{1}HAl(OSi)_{3}$, $(SiO)_{2}(AlO)SiO_{1}HAl(OSi)_{3}$ and $(SiO)_{3}SiO_{1}HAl(OSi)_{3}$. 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.). |
| keywords in English: | IR spectroscopy, zeolites, OH groups, homogeneity |
| affiliation: | Wydział Chemii : Zakład Chemii Nieorganicznej |
| type: | journal article |
| subtype: | academic paper |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||
This item appears in the following Collection(s)
Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
