Speciation and siting of divalent transition metal ions in silicon-rich zeolites. An FTIR study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00511976" target="_blank" >RIV/61388955:_____/19:00511976 - isvavai.cz</a>
Alternative codes found
RIV/00216275:25310/19:39915345
Result on the web
<a href="http://hdl.handle.net/11104/0302209" target="_blank" >http://hdl.handle.net/11104/0302209</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1515/pac-2018-1228" target="_blank" >10.1515/pac-2018-1228</a>
Alternative languages
Result language
angličtina
Original language name
Speciation and siting of divalent transition metal ions in silicon-rich zeolites. An FTIR study
Original language description
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. For more information, please visit: http://creativecommons.org/licenses/by-nc-nd/4.0/ 2019. Speciation and location of Co 2+ , Mn 2+ and Ni 2+ in the extraframework positions of the dehydrated zeolite matrix of ferrierite structure were studied in detail using FTIR spectroscopy of antisymmetric T-O-T vibrations of the zeolite framework. Me 2+ferrierites were prepared by the ion exchange of the NH 4 and Na-zeolite forms and by impregnation of the NH 4 form. Bare Me 2+ occupies all three known cationic sites in dehydrated cationic zeolite. The wavenumbers of bands of individual cations in individual sites were identified. At low Me 2+ loadings (Me 2+ /Al < 0.15), Me 2+ replaces two protonic sites and exclusively bare Me 2+ is present in dehydrated samples. Sets of such samples were employed for the estimation of extinction coefficients of Co 2+ , Mn 2+ and Ni 2+ in cationic sites. These coefficients differ for individual cations but are the same for a cation at different sites. Ion exchange to the NH 4 form allows preparation of samples with maximum possible loading of bare Me 2+ only for Co 2+ . In the case of Mn 2+ , exchange to the Na-parent zeolite or impregnation is required for this purpose while samples with maximum loading by bare Ni 2+ can be prepared only by impregnation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA17-00742S" target="_blank" >GA17-00742S: Binuclear metal ion structures in zeolites</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Pure and Applied Chemistry
ISSN
0033-4545
e-ISSN
—
Volume of the periodical
91
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
1721-1732
UT code for WoS article
000496795300003
EID of the result in the Scopus database
2-s2.0-85064632720