Pulse and Fourier Transform NMR

1st Edition

Introduction to Theory and Methods

Authors: Thomas Farrar Edwin Becker
Hardcover ISBN: 9780122496509
eBook ISBN: 9780080918129
Imprint: Academic Press
Published Date: 28th August 1971
Page Count: 118
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Description

Pulse and Fourier Transform NMR: Introduction to Theory and Methods presents the different types of pulse experiments that are commonly used and provides the theoretical background necessary for understanding these techniques. This book evaluates the practical application of pulse methods and the necessary instrumentation.

Organized into seven chapters, this book begins with an overview of the NMR fundamentals and the basic pulse methods. This text then summarizes the important features of pulse spectrometers. Other chapters consider the rationale, the advantages, and the limitations of Fourier transform NMR methods. This book discusses as well how the idea of the rotating frame can be utilized to understand certain experiments that extend the range of application of pulse methods. The final chapter deals with a few significant special uses of pulse techniques.

This book is a valuable resource for chemists and readers who are familiar with high resolution NMR but with no background in pulse methods.

Table of Contents


Preface


Acknowledgments


Symbols and Abbreviations


1. Basic Concepts in NMR


1.1. Relaxation and Nuclear Magnetic Energy Levels


1.2. Some Basic Properties of Vectors


1.3. Nuclear Precession


1.4. The Bloch Equations


1.5. The Rotating Frame of Reference


1.6. Magnetization in the Rotating Frame


1.7. Fourier Analysis and Fourier Transformation


2. Free Induction and Spin Echoes


2.1. Free Induction Decay


2.2. Measurement of T1


2.3. Measurement of T2 by the Spin-Echo Method


2.4. The Carr-Purcell Technique


2.5. The Meiboom-Gill Method


2.6. Fourier Transform Methods


2.7. Weak Pulses and Selective Relaxation Measurements


2.8. Summary of Basic Pulse Methods


3. Instrumentation


3.1. The Pulsed NMR Spectrometer


3.2. The NMR Sample Probe


3.3. The rf Gate, Pulse Programmer, and rf Transmitter


3.4. The Amplification and Detection System


3.5. Systematic Errors in Pulsed NMR Instruments


4. Relaxation Mechanisms


4.1. Frequency Distribution of Molecular Motions


4.2. Spin-Lattice Interactions


4.3. Dipole-Dipole Relaxation


4.4. Quadrupole Relaxation


4.5. Relaxation via Chemical Shift Anisotropy


4.6. Scalar Relaxation


4.7. Spin-Rotation Relaxation


4.8. Summary of Relaxation Mechanisms


5. Fourier Transform NMR


5.1. Use of the FT Method in Multispin Systems


5.2. Instrumental Requirements


5.3. Computer Requirements


5.4. Effect of Τ1 on Signal/Noise Improvement


5.5. Multiple-Pulse Techniques


5.6. Transient Species; Measurement of Relaxation Times


5.

Details

No. of pages:
118
Language:
English
Copyright:
© Academic Press 1971
Published:
Imprint:
Academic Press
eBook ISBN:
9780080918129
Hardcover ISBN:
9780122496509

About the Author

Thomas Farrar

Edwin Becker

Affiliations and Expertise

National Institutes of Health, Bethesda, Maryland, U.S.A.