Electron paramagnetic resonance spectroscopy
Author(s)
Bibliographic Information
Electron paramagnetic resonance spectroscopy
（Grenoble sciences）
Springer, c2020
- Fundamentals : [pbk]
- Other Title
-
EPR - Fundamentals
La spectroscopie de résonance paramagnétique electronique
Available at 2 libraries
Note
"Translated, revised and adapted from "La spectroscopie de résonance paramagnétique electronique, Vol.1: Fondaments", P. Bretrand, EDP sciences, 2010."-- T.p. verso
"This translation has been supported by UGA Éditions."-- T.p. verso
Includes bibliographical references and index
Description and Table of Contents
Description
Although originally invented and employed by physicists, electron paramagnetic resonance (EPR) spectroscopy has proven to be a very efficient technique for studying a wide range of phenomena in many fields, such as chemistry, biochemistry, geology, archaeology, medicine, biotechnology, and environmental sciences. Acknowledging that not all studies require the same level of understanding of this technique, this book thus provides a practical treatise clearly oriented toward applications, which should be useful to students and researchers of various levels and disciplines. In this book, the principles of continuous wave EPR spectroscopy are progressively, but rigorously, introduced, with emphasis on interpretation of the collected spectra. Each chapter is followed by a section highlighting important points for applications, together with exercises solved at the end of the book. A glossary defines the main terms used in the book, and particular topics, whose knowledge is not required for understanding the main text, are developed in appendices for more inquisitive readers.
Table of Contents
Preface
Fundamental constants. Units conversion.
1 The electron paramagnetic resonance phenomenon
1.1 What is a spectroscopic experiment?
1.2 Magnetic spectroscopies
1.3 Diversity of paramagnetic centers
1.4 Principle of an EPR experiment
1.5 Basic instrumentation for an EPR spectrometer
1.6 Important points for applications
1.7 Appendices : magnetic moment of a particle uniformly moving along a circular
trajectory. Why are O2 and B2 molecules paramagnetic ? Effect of the
modulation on the detected signal
1.8 Exercises
2 Hyperfine structure of the spectrum in the isotropic regime
2.1 Various origins of the structures of an EPR spectrum
2.2 Hyperfine interactions
2.3 The isotropic regime
2.4 Spectrum given by a paramagnetic center interacting with several nuclei
in the isotropic regime
2.5 Important points for applications
2.6 Appendices : The spin label technique. Pascal's triangles.
2.7 Exercises
3 Introduction to the spin states space formalism
3.1 Introduction
3.2 Spin states space associated with an angular momentum
3.3 Possible spin states and energy levels of a paramagnetic center
in a magnetic field
3.4 Transition probability and allowed transitions
3.5 Possible spin states and allowed transitions in the presence
of hyperfine interactions
3.6 Important points for applications
3.7 Appendices : Diagonalization of HZeeman in any basis. Perturbation methods
3.8 Exercices
4 Consequences of the anisotropy of G and A matrices on the shape of spectra
given by radicals and transition ions complexes
4.1 Introduction
4.2 The G matrix
4.3 Shape of the spectrum given by paramagnetic centers without hyperfine
interaction
4.4 Effects of an isotropic hyperfine interaction on the EPR spectrum shape
4.5 Effect of molecules motion on the EPR spectrum: isotropic and
very low motion regimes
4.6 Important points for applications
4.7 Appendices : splitting of the electrons energy levels in an octahedral complex.
Possible values of g' for a rhombic G matrix. Expression of the resonance lines
density for a center with axial symmetry. Energy levels for any direction of the
field for anisotropic G and A matrices. An example of study carried out on a
monocrystal: identifying the Ti3+fluorescence site in LaMgAl11O19.
4.8 Exercices
5 Intensity of the spectrum, saturation, spin-lattice relaxation
5.1 Introduction
5.2 Intensity of the spectrum at thermal equilibrium
5.3 Saturating the signal
5.4 Spin-lattice relaxation
5.5 Important points for applications
5.6 Appendices: Fermi golden rule. Expression of the intensity factor for a
center with axial symmetry with S = 1/2. Homogeneously and inhomogeneously
broadened lines.
5.7 Exercices
6 Zero field splitting. EPR spectra given by paramagnetic centers with spin
greater than 1/2
6.1 Introduction
6.2 The D matrix
6.3 Definition and characteristics of the "high field" and "low field" cases
6.4 General properties of the spectrum in the high field case
6.5 Shape of the spectrum in the high field case
6.6 EPR spectra given by complexes with half integer spins
6.7 EPR spectra given by complexes with integer spins in the low field case
6.8 Important points for applications
6.9 Appendices : resonance line intensity at high temperature in the high field
limit. Shape of the low field spectrum given by a center with S = 1
6.10 Exercises
7 Effect of dipolar and exchange interactions on the EPR spectrum.
Biradicals and polynuclear complexes.
7.1 Introduction
7.2 Origin and description of intercenter spin-spin interactions
7.3 Effect of weak interactions on the spectrum
7.4 Effect of strong exchange interactions on the spectrum
7.5 Effect of intercenter interactions on the intensity of the spectrum
and on relaxation properties.
7.6 Important points for applications
7.7 Appendix. Equivalent Hamiltonian for a trinuclear complex
8 EPR spectra given by rare earth and actinide complexes
8.1 Rare earth ions
8.2 Rare earth complexes : effect of the interactions of electrons with ligands
8.3 EPR spectra given by rare earth complexes with half integer J values
8.4 EPR spectra given by rare earth complexes with integer J values
8.5 Actinide complexes
8.6 Important points for applications
8.7 Appendix: Rare earth and actinides : a touch of etymology
9 Effect of instrumental parameters on the shape and intensity of the
spectrum. Introduction to numerical simulation techniques.
9.1 Introduction
9.2 Scanning and modulating
9.3 Effect of microwave power and frequency. Importance of temperature.
9.4 Numerical simulation of the spectrum saturation
9.5 Introduction to numerical simulation of spectra
9.6 Important points for applications
9.7 Appendices : Basic properties of the convolution product. Quantitative analysis
of the saturation curve for an inhomogeneous line. Quantitative study of the
relaxation broadening of the spectrum. Use of standards. Numerical
simulation software.
9.8 Exercises
10 Appendices
10.1 Magnetic moment of a free atom or ion.
10.2 G and A matrix of a transition ion complex in the ligand field approximation.
10.3 Dipolar interactions between a nucleus and electron spin magnetic moments
10.4 Properties of angular momentum operators. Projection coefficients and
equivalent operators. Application to the Lande formula and to the dipolar
component of hyperfine interactions.
10.5 Spin density
10.6 Calculation of the spin-lattice relaxation time T1 for the direct process
10.7 Matrix elements of operators defined from the components of an angular
momentum.
11 Correction of exercises
12 Glossary
13 References
16 Index
by "Nielsen BookData"