Low Magnetic Field Dependence of the31P Chemically Induced Dynamic Nuclear Polarization in the Photolysis of a Benzoyl Phosphonate. Role of S−T-Mechanism

1999 ◽  
Vol 103 (18) ◽  
pp. 3430-3437 ◽  
Author(s):  
Gennady S. Ananchenko ◽  
Peter A. Purtov ◽  
Elena G. Bagryanskaya ◽  
Renad Z. Sagdeev
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Dynamic Nuclear Polarization ◽  
Magnetic Field Dependence ◽  
Nuclear Polarization ◽  
Chemically Induced ◽  
Low Magnetic Field

Chemisch induzierte Kernpolarisation von Phenylhalogeniden bei der Photolyse von Aroylperoxiden

1969 ◽  
Vol 24 (11) ◽  
pp. 1771-1778 ◽  
Author(s):  
M. Lehnig ◽  
H. Fischer
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Dynamic Nuclear Polarization ◽  
Nmr Spectra ◽  
Magnetic Field Dependence ◽  
Nuclear Polarization ◽  
Radical Reactions ◽  
Chemically Induced ◽  
Polarization Mechanism ◽  
The Magnetic Field

Abstract By a flow technique chemically induced nuclear polarization is observed in the NMR-spectra of phenylhalides formed during photolysis of aroylperoxides in solution. The main features of the polarization are quantitatively explained by dynamic nuclear polarization (CIDNP) of protons in the intermediate phenyl radicals. Some details however indicate that a second polarization mechanism is also present. This mechanism leads to a multiplet-effect type polarization and operates presumably during bond fromation in the radical reactions. Some results on the magnetic field dependence of the nuclear polarizations are given.

Chemically Induced Dynamic Nuclear Polarization. X. On Effects of Nuclear Relaxation and the Magnetic Field Dependence

1972 ◽  
Vol 27 (8-9) ◽  
pp. 1300-1307 ◽  
Author(s):  
M. Lehnig ◽  
H Fischer
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Nuclear Polarization ◽  
Radical Pair ◽  
Reaction Products ◽  
Theory Analysis ◽  
Alkyl Radicals ◽  
Chemically Induced ◽  
The Magnetic Field

Abstract The magnetic field dependence of CIDNP is presented for two reaction products of independently generated alkyl radicals. It is shown that nuclear spin relaxation of the products influences the intensity distributions within multiplets, and how this relaxation can be included in the calculation of CIDNP effects from the radical pair theory. Analysis of the experimental results supports the recent view that CIDNP is created in pairs of radicals which undergo many diffusive displacements before reencounter.

Low magnetic field dependence of A.C. susceptibility in superconducting YBa2Cu3O7−δ

1990 ◽  
Vol 75 (7) ◽  
pp. 579-582 ◽  
Author(s):  
Ahmad Kompany ◽  
Y.J. Qian ◽  
M-F. Xu ◽  
H-P. Baum ◽  
W. Millman ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Low Magnetic Field

Low magnetic field dynamic nuclear polarization using a single-coil two-channel probe

1997 ◽  
Vol 68 (3) ◽  
pp. 1527-1531 ◽  
Author(s):  
Dinh M. TonThat ◽  
Matthew P. Augustine ◽  
Alexander Pines ◽  
John Clarke
Keyword(s):  
Magnetic Field ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Single Coil ◽  
Field Dynamic ◽  
Low Magnetic Field
Sign in / Sign up

Export Citation Format

Share Document