Fermi contact nuclear magnetic resonance shifts in glyme complexes of the coronene radical anion-pair

1970 ◽  
pp. 1035 ◽  
Author(s):  
E. de Boer ◽  
A. M. Grotens ◽  
J. Smid
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Radical Anion ◽  
Fermi Contact ◽  
Nuclear Magnetic

Anisotropy of indirect spin–spin coupling constants from nuclear magnetic resonance powder patterns of rigid solids. 1J(31P,199Hg) in [HgP(o-tolyl)3(NO3)2]2

1988 ◽  
Vol 66 (8) ◽  
pp. 1821-1823 ◽  
Author(s):  
Glenn H. Penner ◽  
William P. Power ◽  
Roderick E. Wasylishen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constants ◽  
Fermi Contact ◽  
Spin Spin Coupling ◽  
Contact Mechanism ◽  
Nuclear Magnetic

The anisotropy of the indirect 31P,199Hg spin–spin coupling constant, ΔJ, in solid [HgP(o-tolyl)3(NO3)2]2 is obtained from an analysis of the 31P nuclear magnetic resonance powder pattern. The value of ΔJ, 5170 ± 250 Hz, is large and indicates that mechanisms other than the Fermi contact mechanism are important for this spin–spin coupling. The powder spectrum also indicates that the absolute sign of 1J(31P,199Hg) is positive.

ChemInform Abstract: EVIDENCE FOR EUROPIUM-INDUCED FERMI CONTACT SHIFTS IN CARBON-13 NUCLEAR MAGNETIC RESONANCE SPEKTRA

1973 ◽  
Vol 4 (30) ◽  
pp. no-no
Author(s):  
OTTO A. GANSOW ◽  
PAUL A. LOEFFLER ◽  
RAYMOND E. DAVIS ◽  
M. R. III WILLCOTT ◽  
ROBERT E. LENKINSKI
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Fermi Contact ◽  
Nuclear Magnetic

Evidence for europium-induced Fermi contact shifts in carbon-13 nuclear magnetic resonance spectra

1973 ◽  
Vol 95 (10) ◽  
pp. 3390-3392 ◽  
Author(s):  
Otto A. Gansow ◽  
Paul A. Loeffler ◽  
Raymond E. Davis ◽  
M. R. Willcott ◽  
Robert E. Lenkinsk
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Fermi Contact ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

An emerging technology: Nuclear magnetic resonance microscopy

1988 ◽  
Vol 46 ◽  
pp. 1000-1001
Author(s):  
M.J. Hennessy ◽  
E. Kwok
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Relaxation Times ◽  
Basic Research ◽  
Local Environment ◽  
Magnetic Resonance Images ◽  
Nmr Microscopy ◽  
Mri Scans ◽  
Temperature Relaxation ◽  
Nuclear Magnetic

Much progress in nuclear magnetic resonance microscope has been made in the last few years as a result of improved instrumentation and techniques being made available through basic research in magnetic resonance imaging (MRI) technologies for medicine. Nuclear magnetic resonance (NMR) was first observed in the hydrogen nucleus in water by Bloch, Purcell and Pound over 40 years ago. Today, in medicine, virtually all commercial MRI scans are made of water bound in tissue. This is also true for NMR microscopy, which has focussed mainly on biological applications. The reason water is the favored molecule for NMR is because water is,the most abundant molecule in biology. It is also the most NMR sensitive having the largest nuclear magnetic moment and having reasonable room temperature relaxation times (from 10 ms to 3 sec). The contrast seen in magnetic resonance images is due mostly to distribution of water relaxation times in sample which are extremely sensitive to the local environment.

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