Advances in Magnetic Resonance (eBook)

Front Cover 1
Advances in Magnetic Resonance 4
Copyright Page 5
Table of Contents 6
PREFACE 8
Chapter 1. Principles and Application of Self-Diffusion Measurements by Nuclear Magnetic Resonance 10
I. Introduction 11
II. Experimental Techniques for a Measurement of Molecular Translational Diffusion 12
III. Diffusion Measurements by Nuclear Magnetic Resonance: A Simplified Model 19
IV. Theory of NMR Self-Diffusion Measurements 23
V. Modifications of the NMR Field Gradient Experiment 29
VI. Influence of Microdynamics and Micro structure 48
VII. Examples of Application 71
VIII. Experimental 90
Chapter 2. The Spin-Lattice Relaxation Time (T1) in Mixtures of Hydrogen Isotopes 100
I. Introduction 100
II. A Review of the Theory of Spin-Lattice Relaxation in Solid H2 101
III. Mixtures of Spin Systems 107
IV. The Model for Relaxation in a Mixture 108
V. The Test of the Relaxation Model 112
VI. Predictions of the Model 119
VII. Conclusions 120
ACKNOWLEDGMENTS 121
Chapter 3. Optical Detection of Nuclear Spin Alignment and Quadrupole Resonance in Organic Molecular Crystals 122
I. Introduction 123
II. Magnetic Resonance in Excited Triplet States of Organic Molecules 125
III. Optical Nuclear Spin Alignment and Polarization 133
IV. Optical Detection of Nuclear Spin Alignment and Quadrupole Resonance 150
V. Comparison of ODNQR in Ground and ODENDOR in Excited States 164
VI. Crystal Field Effects and Defect Structures in Molecular Crystals 176
VII. Level-Anticrossing and Spin Diffusion Effects on ODNQR 182
VIII. Application to Miscellaneous Systems 188
IX. Concluding Remarks 190
ACKNOWLEDGMENT 191
Chapter 4. Spin-1 Behavior of Systems of Dipolar Coupled Pairs of Spin-1/2 Nuclei 192
I. Introduction 193
II. Experimental Considerations 194
III. Formal Description of Dipolar Coupled Spin Systems 196
IV. Pure Preparation, Detection, and Analysis of Coherences 205
V. Preparation of Selected Mixed Coherence States 221
VI. Miscellaneous Sophisticated Pulse Sequences 226
VII. Preparation and Detection of the Quasi-Invariants of the Motion 232
VIII. Relaxation Times of the Quasi-Invariants and Molecular Motions 240
Appendix A. Evolution under Zeeman and Truncated Quadrupole Interaction 250
Appendix B. Commutators and Traces 252
Appendix C. Rotations in Spin Space 253
ACKNOWLEDGMENTS 255
Chapter 5. The Art of Pulse Crafting: Applications to Magnetic Resonance and Laser Spectroscopy 256
I. Introduction and Overview 257
II. Historical Role of Pulse Shapes in Magnetic Resonance and Laser Spectroscopy 266
III. Theoretical Formalisms: Exactly Solvable Cases 304
IV. Perturbative Treatments of Arbitrary Pulse Shapes 331
V. Numerical Optimization Methods 363
VI. Conclusions 393
ACKNOWLEDGMENTS 393
Chapter 6. ¹H NMR Thermal Analysis 394
I. Introduction 394
II. Hardware 398
III. Methodology 402
IV. Analysis of Raw Data 407
V. Applications 414
VI. Summary 430
INDEX 432