Advances in Magnetic Resonance (eBook)

Front Cover 1
Advances in Magnetic Resonance 4
Copyright Page 5
Table of Contents 6
Contributors 8
Contents of Previous Volumes 10
Chapter 1. Temperature-Dependent Splitting Constants in the ESR Spectra of Organic Free Radicals 14
I. Introduction 14
II. Temperature-Dependent Splittings of Protons 15
III. Temperature-Dependent Splittings of Other Nuclei 43
IV. Temperature-Dependent Splittings in Ion Pairs 49
V. Conclusion 61
Chapter 2. Magnetic Resonance Induced by Electrons: Studies of the Simplest Atomic and Molecular Systems 62
I. Introduction 63
II. Electron Impact Excitation: Atoms and Molecules 65
V. The Hamiltonian 70
VI. One-Electron Atoms 78
VII. The Helium Atom 97
VIII. Other Atoms 117
IX. The Hydrogen and Deuterium Molecules 119
X. The He2 Molecule 158
XI. Heavier Molecules 161
XII. Conclusion 168
Chapter 3. Intramolecular Dipolar Relaxation in Multispin Systems 170
I. Introduction 171
II. The Dipolar Cross-Correlation Problem 172
III. Mathematical Treatment of Multispin Relaxation 176
IV. The Dipolar Correlation Function 191
V. Relaxation Equations for Systems Composed of Two, Three, and Four Equivalent Nuclei 201
VI. Relaxation Equations for Systems Composed of Two, Three, and Four Nonequivalent Nuclei 216
VII. Hybrid Spin Systems 225
VIII. Other Multispin Systems 242
IX. Effects of Multispin Correlations in the Presence of Secondary Saturating Fields 244
X. Summary 266
Appendix A 267
Appendix . 275
Summary of Notation 277
ACKNOWLEDGMENTS 280
Chapter 4. NMR Studies of Molecules Oriented in Thermotropic Liquid Crystals 282
I. Introduction 283
II. Basic Theory 285
III. Experimental Details 288
IV. Spectral Analysis 291
V. Factors Limiting the Precision of the Derived Information 297
VI. Orientation of the Solute Molecules 301
VII. Shielding Anisotropics 301
VIII. Studies in a Smectic Phase 303
IX. Diffusion Coefficients of the Molecules Dissolved in Liquid Crystals 304
X. Intramolecular Motion 305
XI. Inorganic Complexes 306
XII. Compounds Studied and Information Derived 308
Appendix A: Compounds Investigated in Thermotropic Liquid Crystals and Reported Earlier 395
Appendix B: Liquid Crystal Solvents Used 397
Appendix C: Additional Literature 401
ACKNOWLEDGMENTS 403
Subject Index 404