Investigation on the nature of catalytically active sites in non-crystalline aluminophosphates from 27Al and 31P MAS-NMR studies

2019 ◽  
Vol 522 ◽  
pp. 119577
Author(s):  
Harish N. ◽  
Kathyayini N. ◽  
Bindhu B. ◽  
Nagaraju N.
Keyword(s):  
Active Sites ◽  
Mas Nmr ◽  
Nmr Studies ◽  
Catalytically Active ◽  
31P Mas Nmr

1H, 13C and 31P MAS NMR studies of lyophilized brain tumors

2010 ◽  
Vol 37 (1-2) ◽  
pp. 21-27 ◽  
Author(s):  
R. MarszaŁek ◽  
M. Pisklak ◽  
D. Horsztyński ◽  
I. Wawer
Keyword(s):  
Brain Tumors ◽  
Mas Nmr ◽  
Nmr Studies ◽  
31P Mas Nmr

1H and 31P MAS NMR studies of solid heteropolyacids and H3PW12O40 supported on SiO2

1990 ◽  
Vol 60 (1) ◽  
pp. 65-70 ◽  
Author(s):  
V.M. Mastikhin ◽  
S.M. Kulikov ◽  
A.V. Nosov ◽  
I.V. Kozhevnikov ◽  
I.L. Mudrakovsky ◽  
...  
Keyword(s):  
Mas Nmr ◽  
Nmr Studies ◽  
31P Mas Nmr

scholarly journals 31P MAS-NMR Studies of Phosphate Salts Formation on Calcium-Containing Oxide Glasses in a Simulated Body Fluid

1996 ◽  
Vol 104 (1215) ◽  
pp. 1000-1003 ◽  
Author(s):  
Satoshi HAYAKAWA ◽  
Kanji TSURU ◽  
Hirohisa IIDA ◽  
Chikara OHTSUKI ◽  
Akiyoshi OSAKA
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Mas Nmr ◽  
Oxide Glasses ◽  
Nmr Studies ◽  
31P Mas Nmr ◽  
Phosphate Salts

31P MAS-NMR Studies of CaO-P2O5 Glass Ceramics

2006 ◽  
Vol 309-311 ◽  
pp. 301-304 ◽  
Author(s):  
A.G. Dias ◽  
M.A. Lopes ◽  
Kanji Tsuru ◽  
Satoshi Hayakawa ◽  
José D. Santos ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Glass Ceramics ◽  
Mas Nmr ◽  
Nmr Studies ◽  
Crystalline Phases ◽  
31P Mas Nmr ◽  
Phosphate System

This work reports the structure of two glass ceramics prepared in the calcium phosphate system, MK5B and MT13B, using 31P MAS-NMR technique. The results obtained showed that the network of MK5B consisted mainly of Q1 and Q2 groups. Besides these two groups, MT13B material also present Q3 units. The Qn groups detected in both glass ceramics seem to be correlated to the crystalline phases present in their microstructure.

Solid State NMR Studies of Ionically Conductive Non-Oxide Chalcogenide Glasses

1988 ◽  
Vol 135 ◽  
Author(s):  
Hellmut Eckert ◽  
Zhengming Zhang ◽  
J. H. Kennedy
Keyword(s):  
Solid State ◽  
Chalcogenide Glasses ◽  
Structural Information ◽  
Microphase Separation ◽  
Mas Nmr ◽  
Oxide Glasses ◽  
Nmr Studies ◽  
Rare Isotope ◽  
31P Mas Nmr ◽  
Lithium Nmr

AbstractThe utility of 29Si, 31 p, and 6.7 Li MAS-NMR at 7.05 T to provide structural information in non-oxide chalcogenide glasses is discussed in connection with experimental results obtained on the systems Li2 S-SiS2, Li2 S-SiS2 -P2S5, and Li2 S-P2 S5-B2 S329Si MAS-NMR data indicate that the principles governing glass formation in these systems are fundamentally different from those applicable to stoichiometry-analog oxide glasses. 31p MAS-NMR can be used to identify microphase-separation in glasses containing two network former constituents. The use of the rare isotope 6 Li instead of 7 Li offers the advantage of significantly improved spectroscopic resolution, enabling the presentation of the first comprehensive lithium NMR chemical shift scale in the solid state.

scholarly journals Manganese vacancy-confined single-atom Ag in cryptomelane nanorods for efficient Wacker oxidation of styrene derivatives

2021 ◽  
Author(s):  
Hongling Yang ◽  
Xun Zhang ◽  
Yi Yu ◽  
Zheng Chen ◽  
Qinggang Liu ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Active Sites ◽  
Single Atom ◽  
Wacker Oxidation ◽  
Catalytically Active ◽  
Styrene Derivatives

Single-atom catalysts provide a pathway to elucidate the nature of catalytically active sites. However, keeping them stabilized during operation proves to be challenging. Herein, we employ cryptomelane-type octahedral molecular sieve...

High-Field1H MAS and15N CP-MAS NMR Studies of Alanine Tripeptides and Oligomers:  Distinction of Antiparallel and Parallel β-Sheet Structures and Two Crystallographically Independent Molecules

2007 ◽  
Vol 111 (30) ◽  
pp. 9172-9178 ◽  
Author(s):  
Yu Suzuki ◽  
Michi Okonogi ◽  
Kazuo Yamauchi ◽  
Hiromichi Kurosu ◽  
Masataka Tansho ◽  
...  
Keyword(s):  
Mas Nmr ◽  
Nmr Studies ◽  
Independent Molecules ◽  
Cp Mas Nmr ◽  
Β Sheet
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