What Is Being Measured with P-Bearing NMR Probe Molecules Adsorbed on Zeolites?

2021 ◽  
Author(s):  
Carlos Bornes ◽  
Michael Fischer ◽  
Jeffrey A. Amelse ◽  
Carlos F. G. C. Geraldes ◽  
João Rocha ◽  
...  
Keyword(s):  
Probe Molecules

INTERACTION OF THE Fe/γ-Al2O3 CATALYTIC SYSTEM WITH PROBE MOLECULES III. STUDY OF THE INTERACTION OF AMMONIA WITH γ-Al2O3 OXIDE AND THE Fe/γ-Al2O3 SYSTEM

2020 ◽  
Vol 3 (441) ◽  
pp. 151-167
Author(s):  
A.R. Brodskiy ◽  
◽  
V.P. Grigoriyeva ◽  
L.V. Komashko ◽  
Y.Y. Nurmakanov ◽  
...  
Keyword(s):  
Catalytic System ◽  
Probe Molecules

Characterisation of Porous Materials by FTIR Spectroscopy of Isotopically Labelled Probe Molecules

2012 ◽  
Vol 2 (2) ◽  
pp. 151-161
Author(s):  
Konstantin Hadjiivanov ◽  
Kristina Chakarova ◽  
Nikola Drenchev ◽  
Mihail Mihaylov
Keyword(s):  
Porous Materials ◽  
Ftir Spectroscopy ◽  
Probe Molecules

scholarly journals The Properties of Cu Ions in Zeolites CuY Studied by IR Spectroscopy

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4686
Author(s):  
Jerzy Podobiński ◽  
Mariusz Gackowski ◽  
Grzegorz Mordarski ◽  
Katarzyna Samson ◽  
Michał Śliwa ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Positive Charge ◽  
Co Adsorption ◽  
The Other ◽  
Probe Molecules ◽  
Adsorption And Desorption ◽  
Other Hand ◽  
Close Proximity ◽  
No And Co Adsorption ◽  
Cu Ions

The properties of both Cu2+ and Cu+ ions in zeolite CuY were followed with NO and CO as probe molecules. Cu2+ was found to be located in SII, SII*, and SIII sites, whereas Cu+ was found in SII and SII* sites. The fine analysis of the spectra of Cu2+-NO and Cu+-CO adducts suggests that both in SII and in SII* sites two kinds of Cu cations exist. They differ in the positive charge, which may be related to the varying numbers of AlO4− in close proximity. The experiments of NO and CO adsorption and desorption evidenced that both Cu2+ and Cu+ sites of highest positive charge bind probe molecules most strongly but activate them to a lesser extent than the Cu sites of lowest positive charge. The experiments of reduction with hydrogen evidenced that the Cu ions of higher positive charge are first reduced by hydrogen. On the other hand, Cu sites of the lowest positive charge are first oxidized by oxygen. The experiments with CuNaY zeolites of various Cu contents suggest that the first introduced Cu (at low Cu contents) created Cu+, which was the most neutralized by framework oxygens. Such Cu cations are the most stabilized by framework oxygens.

ChemInform Abstract: FTIR Spectroscopy of Adsorbed Probe Molecules for Analyzing the Surface Properties of Supported Pt (Pd) Catalysts

ChemInform ◽  
2013 ◽  
Vol 44 (51) ◽  
pp. no-no ◽  
Author(s):  
Olga B. Belskaya ◽  
Irina G. Danilova ◽  
Maxim O. Kazakov ◽  
Roman M. Mironenko ◽  
Alexander V. Lavrenov ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Surface Properties ◽  
Probe Molecules ◽  
Pd Catalysts

scholarly journals Probing Zeolite Crystal Architecture and Structural Imperfections using Differently Sized Fluorescent Organic Probe Molecules

2017 ◽  
Vol 23 (26) ◽  
pp. 6224-6224
Author(s):  
Frank C. Hendriks ◽  
Joel E. Schmidt ◽  
Jeroen A. Rombouts ◽  
Koop Lammertsma ◽  
Pieter C. A. Bruijnincx ◽  
...  
Keyword(s):  
Probe Molecules ◽  
Zeolite Crystal ◽  
Structural Imperfections

Acidity of Alginate Aerogels Studied by FTIR Spectroscopy of Probe Molecules

2005 ◽  
Vol 230 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Romain Valentin ◽  
Raluca Horga ◽  
Barbara Bonelli ◽  
Edoardo Garrone ◽  
Francesco Di Renzo ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Probe Molecules
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