Kinetic Theory of Nuclear Magnetic Relaxation of Polyatomic Molecules

1975 ◽  
Vol 53 (7) ◽  
pp. 707-722 ◽  
Author(s):  
B. C. Sanctuary ◽  
R. F. Snider
Keyword(s):  
Magnetic Relaxation ◽  
Degrees Of Freedom ◽  
Point Group ◽  
Relaxation Times ◽  
Spin Symmetry ◽  
Nuclear Magnetic Relaxation ◽  
Group Symmetry ◽  
Rotating Frame ◽  
Rotational Degrees Of Freedom ◽  
Nuclear Magnetic

Nuclear magnetic relaxation of polyatomic gases is discussed in terms of a Boltzmann equation. Weak intramolecular coupling is used to obtain formal expressions for the spin relaxation times and the chemical shift. In particular, restrictions arising from spin symmetry and from molecular point group symmetry are included.In carrying out the weak coupling calculation, it is necessary to approximate the time dependence of the rotational degrees of freedom. Here this is done with the aid of the 'rotating frame approximation', that is, all polarizations in the gas rotate in phase with the spins. This approximation is discussed from several points of view, including a mathematical discussion for a particular example. Finally the rotating frame approximation is related to the memory effects of general relaxation theory.

NUCLEAR MAGNETIC RELAXATION TIMES

1963 ◽  
Author(s):  
Edwin A. Uehling
Keyword(s):  
Magnetic Relaxation ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Nuclear Magnetic

Nuclear Magnetic Relaxation by Anisotropy of the Chemical Shift

1972 ◽  
Vol 27 (10) ◽  
pp. 1456-1458 ◽  
Author(s):  
J Blicharski
Keyword(s):  
Chemical Shift ◽  
Magnetic Relaxation ◽  
Chemical Shifts ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Nuclear Magnetic

Abstract The relaxation times T1 , T2 , T1Q and T2Q are calculated in the weak collision case in the presence of anisotropy of the chemical shifts.

Magnetische Relaxation in Glycerin

1969 ◽  
Vol 24 (1) ◽  
pp. 143-153 ◽  
Author(s):  
F . Noack ◽  
G . Preissing
Keyword(s):  
Distribution Function ◽  
Magnetic Relaxation ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Frequency Range ◽  
Glycerol Water ◽  
Correlation Times ◽  
Pure Glycerol ◽  
New Type ◽  
Nuclear Magnetic

AbstractProton nuclear magnetic relaxation times in pure glycerol and glycerol water mixtures have been measured in the frequency range from 450 kHz . . . 120 MHz from -20 °C .. . 70 °C. The results cannot be interpreted in terms of the well-known distributions of dielectric correlation times (Log-Gaussian, Cole-Davidson etc.), as has been proposed recently. Instead a new type of distribution function, called "diffusion-distribution", is introduced.

Rotating-frame nuclear magnetic relaxation inTlH2PO4

1997 ◽  
Vol 55 (17) ◽  
pp. 11088-11091 ◽  
Author(s):  
C. H. Lee ◽  
K. W. Lee ◽  
Cheol Eui Lee ◽  
K.-S. Lee
Keyword(s):  
Magnetic Relaxation ◽  
Nuclear Magnetic Relaxation ◽  
Rotating Frame ◽  
Nuclear Magnetic

Nuclear magnetic relaxation times of water sorbed by proteins. Lysozyme and serum albumin

1968 ◽  
Vol 26 (3) ◽  
pp. 306-316 ◽  
Author(s):  
Wallace S Brey ◽  
Thomas E Evans ◽  
Lewis H Hitzrot
Keyword(s):  
Serum Albumin ◽  
Magnetic Relaxation ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Nuclear Magnetic

Integrated analysis of modified Japanese cypress using solid-state NMR spectra and nuclear magnetic relaxation times

Cellulose ◽  
2019 ◽  
Vol 26 (6) ◽  
pp. 3625-3642 ◽  
Author(s):  
Masakazu Nishida ◽  
Tomoko Tanaka ◽  
Tsunehisa Miki ◽  
Yoshio Hayakawa ◽  
Kozo Kanayama
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Magnetic Relaxation ◽  
Nmr Spectra ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Integrated Analysis ◽  
Japanese Cypress ◽  
Nuclear Magnetic

Nuclear magnetic relaxation of 205Tl in TlClO4 in a rotating frame

1986 ◽  
Vol 116 (2) ◽  
pp. 85-88 ◽  
Author(s):  
Kunihiko Morimoto ◽  
Kenji Shimomura
Keyword(s):  
Magnetic Relaxation ◽  
Nuclear Magnetic Relaxation ◽  
Rotating Frame ◽  
Nuclear Magnetic

Calculation of dipolar nuclear magnetic relaxation times in molecules with multiple internal rotations

1973 ◽  
Vol 25 (3) ◽  
pp. 497-514 ◽  
Author(s):  
Y.K. Levine ◽  
P. Partington ◽  
G.C.K. Roberts
Keyword(s):  
Magnetic Relaxation ◽  
Relaxation Times ◽  
Nuclear Magnetic Relaxation ◽  
Internal Rotations ◽  
Nuclear Magnetic
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