Solid-State 1H MAS NMR Characterization of γ-Alumina and Modified γ-Aluminas

1994 ◽  
Vol 148 (1) ◽  
pp. 76-83 ◽  
Author(s):  
E.C. Decanio ◽  
J.C. Edwards ◽  
J.W. Bruno
Keyword(s):  
Solid State ◽  
Mas Nmr ◽  
1H Mas Nmr ◽  
Nmr Characterization

51V and 133Cs MAS NMR Investigation of Crystalline Trivanadate and Hexavanadate Phases.

2006 ◽  
Vol 984 ◽  
Author(s):  
Olivier Durupthy ◽  
Jocelyne Maquet ◽  
Nathalie Steunou ◽  
Christian Bonhomme ◽  
Jacques Livage
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Local Environment ◽  
Vanadium Oxides ◽  
Mas Nmr ◽  
Water Molecules ◽  
Cesium Ions ◽  
Nmr Characterization ◽  
Interlamellar Space

AbstractA complete solid state NMR characterization of the vanadium oxides Cs[V3O8] and Cs2[V6O16].0.7H2O is proposed. We used 51V and 133Cs MAS NMR to investigate the local environment of cesium and vanadium nuclei and 2D 1H- 133Cs CP MAS HETCOR experiments to explore the connectivities between cesium ions and water molecules in the interlamellar space.

Crystal Structure, Infrared and Solid State CP MAS NMR Characterization of [(PPh3)2AgO2CH] and of [(PPh3)2AgO2CH].cntdot.2HCO2H, a Complex of the H-Bonded [H2(HCO2)3]- Species

1995 ◽  
Vol 99 (12) ◽  
pp. 3909-3917 ◽  
Author(s):  
Graham A. Bowmaker ◽  
Effendy ◽  
John V. Hanna ◽  
Peter C. Healy ◽  
Graeme J. Millar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Mas Nmr ◽  
Nmr Characterization ◽  
Cp Mas Nmr

1H MAS NMR characterization of hydrogen over silica-supported rhodium catalyst

2001 ◽  
Vol 44 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Zisheng Chao ◽  
Tinghua Wu ◽  
Jianliang Ye ◽  
Guozhou Chen ◽  
Huilin Wan
Keyword(s):  
Rhodium Catalyst ◽  
Mas Nmr ◽  
1H Mas Nmr ◽  
Nmr Characterization ◽  
Supported Rhodium Catalyst

29Si NMR Characterization of Silica Tetrahedron in the Silica Fume Simulate Hydration

2013 ◽  
Vol 539 ◽  
pp. 1-4 ◽  
Author(s):  
Xiao Jun Wang ◽  
Xiao Yao Wang ◽  
Hong Fei Zhu ◽  
Chen Qian
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Silica Fume ◽  
Chain Length ◽  
Pozzolanic Reaction ◽  
Mas Nmr ◽  
Alkali Solution ◽  
Nmr Characterization ◽  
Cementitious System

As the major structure of silica fume, the change of silica tetrahedron in the pozzolanic reaction during the hydration has not been revealed clearly in previous studies. In this study, 29Si solid-state MAS NMR was used to characterize the silica tetrahedron change of the silica fume in saturated alkali solution with 0.9, 1.2, 1.5 and 1.8 four different calcium/silica ratios. The amorphous Q4 silica tetrahedron structure in silica fume changed into Q1 silica tetrahedron at 1 day. Q2 silica tetrahedron formed from Q1 silica tetrahedron within 3 days. Q1 and Q2 silica tetrahedron reached a balance until silica fume completed pozzolanic reaction and the Q4 silica tetrahedron exhausted. The coexistence of Q1 and Q2 silica tetrahedron benefited the physical properties increase of cementitious system. 29Si solid-state MAS NMR results proved that the chain length of silica tetrahedron in C-S-H shortened in the silica fume hydration while the C/S ratio increased.

Multinuclear MAS NMR Characterization of Fly‐Ash‐Based Advanced Sodium Aluminosilicate Geopolymer: Exploring Solid‐State Reactions

2020 ◽  
Vol 5 (16) ◽  
pp. 4920-4927
Author(s):  
Rainy Gupta ◽  
Akshay Singh Tomar ◽  
Deepti Mishra ◽  
Sunil Kumar Sanghi
Keyword(s):  
Fly Ash ◽  
Solid State ◽  
Mas Nmr ◽  
Solid State Reactions ◽  
Sodium Aluminosilicate ◽  
Nmr Characterization

Solid-State NMR characterization of a superactive supported ziegler–natta catalyst

1993 ◽  
Vol 48 (12) ◽  
pp. 2173-2179 ◽  
Author(s):  
James C. Vizzini ◽  
J.-F. Shi ◽  
James C. W. Chien
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Characterization ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Phosphorus-31 two-dimensional solid-state exchange NMR characterization of dynamics of crosslinks in a model network polymer

1993 ◽  
Vol 26 (5) ◽  
pp. 1008-1012 ◽  
Author(s):  
J. F. Shi ◽  
L. Charles Dickinson ◽  
William J. MacKnight ◽  
James C. W. Chien ◽  
Changan Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Two Dimensional ◽  
Network Polymer ◽  
Model Network ◽  
Nmr Characterization
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