One-dimensional spatial localization of spin-lattice relaxation times using rotating-frame imaging

1985 ◽  
Vol 62 (2) ◽  
pp. 322-327
Author(s):  
John P. Boehmer ◽  
Kenneth R. Metz ◽  
Richard W. Briggs
Keyword(s):  
Relaxation Times ◽  
Spatial Localization ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Rotating Frame ◽  
One Dimensional ◽  
Spin Lattice

Molecular Motions in Halogen-Bridged One-Dimensional Pt Complexes, [PtII(en)2][PtIVX2(en)2](ClO4)4 (X = Cl, Br) Studied by 2H and 1H NMR

2002 ◽  
Vol 57 (6-7) ◽  
pp. 413-418 ◽  
Author(s):  
Noriyoshi Kimura ◽  
Toru Hachisuka ◽  
Yukitaka Nakano ◽  
Ryuichi Ikeda
Keyword(s):  
Relaxation Times ◽  
Lattice Relaxation ◽  
Energy Difference ◽  
Spin Lattice Relaxation ◽  
X Ray Diffraction ◽  
Potential Wells ◽  
One Dimensional ◽  
X Ray ◽  
Spin Lattice ◽  
H Nmr

2H and 1H NMR measurements were performed on crystalline [Pt(en)2][PtX2(en)2](ClO4)4 (X = Cl, Br), where the protonated and partially deuterated ethylenediamines (en’s), NH2(CH2)2NH2, NH2(CD2)2NH2 and ND2(CH2)2ND2 were used as ligands. Measurements of 2H and 1H NMR spin-lattice relaxation times showed the presence of motions of en chelate rings at the temperatures near the phase transitions, whereas broad 2H NMR spectra and the reported X-ray diffraction data showed no marked motions. These results were consistently explained by introducing the en puckering motion between highly asymmetric potential wells with an energy difference of 10 - 13 kJ mol-1. This difference was shown to be much larger than 2 - 5 kJ mol-1, reported for the iodo-complex, [Pt(en)2][PtI2(en)2](ClO4)4

scholarly journals NMR relaxometry: Spin lattice relaxation times in the laboratory frame versus spin lattice relaxation times in the rotating frame

2010 ◽  
Vol 495 (4-6) ◽  
pp. 287-291 ◽  
Author(s):  
Emilie Steiner ◽  
Mehdi Yemloul ◽  
Laouès Guendouz ◽  
Sébastien Leclerc ◽  
Anthony Robert ◽  
...  
Keyword(s):  
Relaxation Times ◽  
Lattice Relaxation ◽  
Laboratory Frame ◽  
Spin Lattice Relaxation ◽  
Rotating Frame ◽  
Spin Lattice ◽  
Nmr Relaxometry

Milli-Kelvin NQR: A Study of the Praseodymium Trihalides

1992 ◽  
Vol 47 (1-2) ◽  
pp. 221-226 ◽  
Author(s):  
Robin L. Armstrong ◽  
Sunyu Su
Keyword(s):  
Relaxation Times ◽  
Lattice Relaxation ◽  
Dilution Refrigerator ◽  
Spin Lattice Relaxation ◽  
Technical Consideration ◽  
One Dimensional ◽  
Spin Lattice ◽  
Quadrupole Resonance

AbstractMilli - Kelvin NQR experiments are often essential for the study of pseudo one-dimensional materials. A brief overview of the special technical consideration for carrying out NQR measurements in a dilution refrigerator is given. Recent halide quadrupole resonance experiments on the pseudo one-dimensional XY crystals PrCl3 and PrBr3 are reviewed including the measurement and interpretation of frequencies, and spin-lattice relaxation times.

Sign in / Sign up

Export Citation Format

Share Document