Structure and Dynamics of Hydrous Surface Species on Alumina−Boria Catalysts and Their Precursors from 1H, 2H, 11B, and 27Al MAS NMR Spectroscopy

2009 ◽  
Vol 113 (6) ◽  
pp. 2475-2486 ◽  
Author(s):  
Michael Ryan Hansen ◽  
Hans J. Jakobsen ◽  
Jørgen Skibsted
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Surface Species ◽  
Structure And Dynamics ◽  
27Al Mas Nmr

Surface Species Formed during Aniline Methylation on Zeolite H–Y Investigated by in Situ MAS NMR Spectroscopy

2001 ◽  
Vol 203 (2) ◽  
pp. 375-381 ◽  
Author(s):  
Irina I Ivanova ◽  
Elena B Pomakhina ◽  
Alexander I Rebrov ◽  
Michael Hunger ◽  
Yuryi G Kolyagin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Surface Species

27Al-MAS-NMR-Untersuchungen des thermischen Abbaus von NH4Al(SO4)2·12H2O / 27Al-MAS-NMR Studies on the Thermolysis of NH4Al(SO4)2· 12H2O

1991 ◽  
Vol 46 (11) ◽  
pp. 1515-1518 ◽  
Author(s):  
Gerhard Wegner ◽  
Gert Blumenthal ◽  
Dirk Müller ◽  
Dirk-Henning Menz ◽  
Antje Schmalstieg
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Changes ◽  
Chemical Shifts ◽  
Mas Nmr ◽  
Nmr Studies ◽  
High Stage ◽  
27Al Mas Nmr ◽  
High Resolution Nmr ◽  
First Time

Products of the thermolysis of NH4Al-alum were prepared under dried air and characterized by X-ray powder diffraction, thermogravimetry, and for the first time by solid-state 27Al-MAS-NMR spectroscopy. It was found, that high resolution NMR spectroscopy is applicable to follow up the thermal decomposition and to indicate even minor structural changes. 27Al-MAS-NMR spectra show peaks with characteristic chemical shifts for octahedral Al-units up to a high stage of thermolysis. During the decomposition of Al2(SO4)3 to γ-Al2O3 we again observed three-peak spectra with the specific signal at ≈ 35 ppm for penta-coordinated Al ions as recently proved for the thermolysis of AlCl3 · 6 H2O.

scholarly journals A long-term study on the setting reaction of glass ionomer cements by 27Al MAS-NMR spectroscopy

2009 ◽  
Vol 25 (3) ◽  
pp. 290-295 ◽  
Author(s):  
Norhazlin Zainuddin ◽  
Natalia Karpukhina ◽  
Robert G. Hill ◽  
Robert V. Law
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Term Study ◽  
Setting Reaction ◽  
Long Term Study ◽  
27Al Mas Nmr

Determination of the Al/Si distribution in synthetic KxMg2Al4+xSi5−xO18 (0< x ⩽1) cordierites by 29Si and 27Al MAS-NMR spectroscopy

1991 ◽  
Vol 26 (18) ◽  
pp. 5053-5059 ◽  
Author(s):  
J. Senegas ◽  
A. R. Grimmer ◽  
D. Muller ◽  
P. Thomas ◽  
D. Mercurio ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
27Al Mas Nmr

Structure and dynamics of starch crosslinked with urea-formaldehyde polymers by carbon-13 CP/MAS NMR spectroscopy

1992 ◽  
Vol 25 (10) ◽  
pp. 2746-2751 ◽  
Author(s):  
Parshuram G. Shukla ◽  
Swaminathan Sivaram ◽  
Baijayantimala Mohanty
Keyword(s):  
Nmr Spectroscopy ◽  
Urea Formaldehyde ◽  
Mas Nmr ◽  
Structure And Dynamics ◽  
Cp Mas Nmr

Phosphate speciation in excessively fertilized soil: a 31P and 27Al MAS NMR spectroscopy study

1996 ◽  
Vol 47 (1) ◽  
pp. 125-130 ◽  
Author(s):  
R. LOOKMAN ◽  
H. GEERTS ◽  
P. GROBET ◽  
R. MERCKX ◽  
K. VLASSAK
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Spectroscopy Study ◽  
Fertilized Soil ◽  
27Al Mas Nmr ◽  
Phosphate Speciation

The acid properties of H-ZSM-5 as studied by NH3-TPD and 27Al-MAS-NMR spectroscopy

2007 ◽  
Vol 328 (2) ◽  
pp. 174-182 ◽  
Author(s):  
Luz Rodríguez-González ◽  
Florian Hermes ◽  
Marko Bertmer ◽  
Enrique Rodríguez-Castellón ◽  
Antonio Jiménez-López ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Acid Properties ◽  
27Al Mas Nmr
Sign in / Sign up

Export Citation Format

Share Document