Dynamics of water molecules in VPI-5 and AlPO4-5 studied by deuterium NMR spectroscopy

1992 ◽  
Vol 114 (10) ◽  
pp. 3690-3697 ◽  
Author(s):  
Daniella Goldfarb ◽  
Hong Xin Li ◽  
Mark E. Davis
Keyword(s):  
Nmr Spectroscopy ◽  
Deuterium Nmr ◽  
Water Molecules

Restricted Rotational Motion of InterlayerWaterMolecules in Vanadium Pentoxide Hydrate, V2O5·n D2O, as Studied by Deuterium NMR

2002 ◽  
Vol 57 (6-7) ◽  
pp. 419-424 ◽  
Author(s):  
Sadamu Takeda ◽  
Yuko Gotoh ◽  
Goro Maruta ◽  
Shuichi Takahara ◽  
Shigeharu Kittaka
Keyword(s):  
Double Layer ◽  
Vanadium Pentoxide ◽  
Rotational Motion ◽  
Interlayer Space ◽  
Layer Structure ◽  
Bond Distance ◽  
Adsorbed Water ◽  
Deuterium Nmr ◽  
Water Molecules ◽  
Layer Structures

The rotational behavior of the interlayer water molecules of deuterated vanadium pentoxide hydrate, V2O5.nD2O, was studied by solid-state deuterium NMR for the mono- and double-layer structures of the adsorbed water molecules. The rotational motion was anisotropic even at 355 K for both the mono- and double-layer structures. The 180° flipping motion about the C2-symmetry axis of the water molecule and the rotation around the figure axis, which makes an angle Ɵ with the C2-axis, occurred with the activation energy of (34±4) and (49±6) kJmol-1, respectively. The activation energies were almost independent of the mono- and double-layer structures of the water molecules, but the angle Ɵ made by the two axes varied from 33° for the monolayer to 25° for the double-layer at 230 K. The angle started to decrease above 250 K (e. g. the angle was 17 at 355 K for the double-layer structure). The results indicate that the average orientation of the water molecules in the two dimensional interlayer space depends on the layer structure and on the temperature. From the deuterium NMR spectrum at 130 K, the quadrupole coupling constant e2Qq/h = 240 kHz and the asymmetry parameter η= 0.12 were deduced. These values indicate the average hydrogen bond distance R(O H) = 2.0 Å for the D2O molecules in the 2D-interlayer space

Water molecules in DNA recognition I: hydration lifetimes of trp operator DNA in solution measured by NMR spectroscopy 1 1Edited by B. Honig

1998 ◽  
Vol 282 (4) ◽  
pp. 847-858 ◽  
Author(s):  
Maria Sunnerhagen ◽  
Vladimir P Denisov ◽  
Kandadai Venu ◽  
Alexandre M.J.J Bonvin ◽  
Jannette Carey ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Dna Recognition ◽  
Water Molecules ◽  
Operator Dna

scholarly journals Investigation of Fatty Acid Elongation and Desaturation Steps inFusarium lateritiumby Quantitative Two-dimensional Deuterium NMR Spectroscopy in Chiral Oriented Media

2009 ◽  
Vol 284 (16) ◽  
pp. 10783-10792 ◽  
Author(s):  
Vincent Baillif ◽  
Richard J. Robins ◽  
Steven Le Feunteun ◽  
Philippe Lesot ◽  
Isabelle Billault
Keyword(s):  
Fatty Acid ◽  
Nmr Spectroscopy ◽  
Deuterium Nmr ◽  
Fatty Acid Elongation ◽  
Two Dimensional

ChemInform Abstract: Side Chain Dynamics of Crystalline L-(3,3-2H2)Methionine Studied by Deuterium NMR Spectroscopy.

ChemInform ◽  
1988 ◽  
Vol 19 (38) ◽  
Author(s):  
S. W. SPARKS ◽  
N. BUDHU ◽  
P. E. YOUNG ◽  
D. A. TORCHIA
Keyword(s):  
Nmr Spectroscopy ◽  
Side Chain ◽  
Deuterium Nmr ◽  
Chain Dynamics ◽  
Side Chain Dynamics

Dynamics of hydroxyl deuterons and bonded water molecules in NaDY(0.8) zeolite as studied by means of deuteron NMR spectroscopy and relaxation

2010 ◽  
Vol 37 (3-4) ◽  
pp. 91-100 ◽  
Author(s):  
Z.T. Lalowicz ◽  
G. Stoch ◽  
A. Birczyński ◽  
M. Punkkinen ◽  
M. Krzystyniak ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Water Molecules ◽  
Deuteron Nmr

scholarly journals Solid-state deuterium NMR spectroscopy of d5-phenol in white portland cement: a new method for assessing solidification/stabilization

1993 ◽  
Vol 27 (7) ◽  
pp. 1426-1433 ◽  
Author(s):  
Michael A. Janusa ◽  
Xiao Wu ◽  
Frank K. Cartledge ◽  
Leslie G. Butler
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Portland Cement ◽  
New Method ◽  
Deuterium Nmr ◽  
White Portland Cement
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