| Chemically Induced Dynamic Nuclear and Electron Polarizations-Cidnp and Cidep Softcover Repri Edition Contributor(s): Richard, C. (Author), Granger, P. (Author) |
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ISBN: 3642657958 ISBN-13: 9783642657955 Publisher: Springer OUR PRICE: $104.49 Product Type: Paperback Published: November 2011 |
| Additional Information |
| BISAC Categories: - Science | Chemistry - Physical & Theoretical - Science | Chemistry - Organic |
| Dewey: 541.224 |
| Series: NMR Basic Principles and Progress |
| Physical Information: 0.29" H x 6.69" W x 9.61" (0.50 lbs) 130 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: 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. |