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140122 ||| eng |
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|a 9783642657931
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|a Richard, C.
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|a Chemically Induced Dynamic Nuclear and Electron Polarizations-CIDNP and CIDEP
|h Elektronische Ressource
|c by C. Richard, P. Granger
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| 250 |
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|a 1st ed. 1974
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| 260 |
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|a Berlin, Heidelberg
|b Springer Berlin Heidelberg
|c 1974, 1974
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|a II, 130 p
|b online resource
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|a I. Origin of the CIDNP Effect -- I. Introduction -- II. The Phenomenon -- III. First Interpretations of the CIDNP Effect -- IV. The Radical-Pair Theory -- V. Applications of the CIDNP Effect -- VI. Experimental Procedures -- II. The Theory of the CIDNP Effect -- I. Basic Principles -- II. The Radical-Pair Model -- III. Theoretical Calculation of the CIDNP Effect (CKO) -- IV. Kinetic Formulation of the Radical-Pair Mechanism -- V. The Influence of the Magnetic Field H0 on the CIDNP Spectra -- VI. Relaxation and other Effects -- III. Applications to the Study of Chemical Reactions and Magnetic Properties -- I. Applications to the Study of Chemical Reactions -- II. Determination of the Magnetic Properties of Radicals and Molecules -- IV. The Chemically Induced Dynamic Electron Polarization (CIDEP Effect) -- I. Introduction -- II. Experimental Procedures -- III. Experimental Results -- IV. The Theory of the CIDEP Effect -- Conclusion -- References -- Subject-Index
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| 653 |
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|a Physical chemistry
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| 653 |
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|a Chemistry, Organic
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| 653 |
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|a Physical Chemistry
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| 653 |
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|a Organic Chemistry
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| 700 |
1 |
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|a Granger, P.
|e [author]
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|a eng
|2 ISO 639-2
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| 989 |
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|b SBA
|a Springer Book Archives -2004
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| 490 |
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|a NMR Basic Principles and Progress
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| 028 |
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|a 10.1007/978-3-642-65793-1
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| 856 |
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|u https://doi.org/10.1007/978-3-642-65793-1?nosfx=y
|x Verlag
|3 Volltext
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|a 547
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|a 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
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