Name: chemically induced dynamic nuclear and electron polarizations-cidnp and cidep (en Inglés)
SKU: 24699551
Price: 1858.65 MXN
Availability: InStock
Author: Richard, C. ; Granger, P.
ISBN: 9783642657955

portada chemically induced dynamic nuclear and electron polarizations-cidnp and cidep (en Inglés)

chemically induced dynamic nuclear and electron polarizations-cidnp and cidep (en Inglés)

Formato

Libro Físico

Autor

C. Richard

P. Granger

Editorial

Springer

Año

2011

Idioma

Inglés

N° páginas

130

Encuadernación

Tapa Blanda

Dimensiones

24.4x17x0.7 cm

Peso

0.23 kg.

ISBN

3642657958

ISBN13

9783642657955

Categorías

Química orgánica
Química física

chemically induced dynamic nuclear and electron polarizations-cidnp and cidep (en Inglés)

C. Richard (Autor) · P. Granger (Autor) · Springer · Tapa Blanda

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Reseña del libro "chemically induced dynamic nuclear and electron polarizations-cidnp and cidep (en Inglés)"

Anomalous electron-spin state populations in the Electron Paramagnetic Re- sonance (EPR) spectra of radicals formed during radio lysis experiments were observed in 1963 by FESSENDEN and SCHULER [170a]. This phenomenon did not receive much attention at the time. In 1967, BARGON, FISCHER, and JOHNSEN [5] and independently WARD and LAWLER [7,8] reported a similar phenomenon for Nuclear Magnetic Resonance (NMR) spectra taken during radical reactions: emission or enhanced absorption, or both. The earliest attempts to explain this new NMR phenomenon treated these effects in a way similar to that of Dynamic Nuclear Polarization (DNP) or the Overhauser effect. Although the polarization has a completely different origin, DNP gave its name to this effect: Chemically Induced Dynamic Nuclear Polariza- tion (CIDNP). [The name Chemically Induced Dynamic Electron Polarization (CIDEP) was introduced later by analogy with CIDNP]. After the initial publica- tions, all the new data demonstrated that the first theory could not be correct. In 1969, a new theory was proposed by CLOSS [18] and independently by KAPTEIN and OOSTERHOFF [23] and called the radical-pair theory. This mechanism was proposed to account for the observations of polarization in both NMR and EPR. The radical-pair theory is based on weak interactions in a pair of radicals: the strength of interaction between the electronic states of the radicals depends in particular on the nuclear-spin states.