Modern Raman Spectroscopy - Ewen Smith

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Résumé :

Preface ix

Acknowledgements xi

Chapter 1 Introduction, Basic Theory and Principles 1

1.1 Introduction 1

1.2 History 2

1.3 Basic Theory 2

1.4 Molecular Vibrations 8

1.5 Group Vibrations 11

1.6 Basic Interpretation of a Spectrum 13

1.7 Summary 19

Chapter 2 The Raman Experiment - Raman Instrumentation, Sample Presentation, Data Handling and Practical Aspects of Interpretation 21

2.1 Introduction 21

2.2 Choice of Instrument 22

2.3 Transmission Raman Scattering and Spatially Offset Raman Scattering 29

2.4 Raman Sample Preparation and Handling 30

2.4.1 Sample Mounting - Optical Considerations 31

2.4.2 Raman Sample Handling 34

2.5 Sample Mounting Accessories 40

2.5.1 Small Fibres, Films, Liquids and Powders 40

2.5.2 Variable Temperature and Pressure Cells 40

2.5.3 Special Applications - Thin Films, Surfaces and Catalysts 42

2.5.4 Reaction Cells, Flow Through Cells, Sample Changers and Automated Mounts 44

2.6 Fibre?Optic Coupling and Wave Guides 45

2.7 Microscopy 49

2.7.1 Raman Microscopes 49

2.7.2 Depth Profiling 51

2.7.3 Imaging and Mapping 51

2.8 Calibration 56

2.9 Data Manipulation, Presentation and Quantitation 59

2.9.1 Manipulation of Spectra for Presentation 59

2.9.2 Presentation of Spectra 63

2.9.3 Quantitation 64

2.10 An Approach to Qualitative Interpretation 66

2.10.1 Factors to Consider in the Interpretation of a Raman Spectrum of an Unknown Sample 67

2.10.1.1 Knowledge of the Sample and Sample Preparation Effects 68

2.10.1.2 Instrument and Software Effects 69

2.10.1.3 The Spectrum 69

2.10.2 Computer?Aided Spectrum Interpretation 70

2.10.3 Spectra Formats for Transfer and Exchange of Data 73

2.11 Summary 74

Chapter 3 The Theory of Raman Spectroscopy 77

3.1 Introduction 77

3.2 Absorption and Scattering 78

3.3 States of a System and Hooke's Law 79

3.4 The Basic Selection Rule 82

3.5 Number and Symmetry of Vibrations 83

3.6 The Mutual Exclusion Rule 84

3.7 Understanding Polarizability 85

3.8 Polarizability and the Measurement of Polarization 89

3.9 Symmetry Elements and Point Groups 93

3.10 Lattice Modes 97

3.11 Summary 98

Chapter 4 Resonance Raman Scattering 101

4.1 Introduction 101

4.2 The Basic Process 102

4.3 Key Differences Between Resonance and Normal Raman Scattering 102

4.3.1 Intensity Increase 103

4.3.2 Franck Condon and Herzberg Teller Scattering 105

4.3.3 Overtones 108

4.3.4 Wavelength Dependence 109

4.3.5 Electronic Information 111

4.4 Practical Aspects 113

4.5 Summary 116

Chapter 5 Surface Enhanced Raman Scattering and Surface Enhanced Resonance Raman Scattering 119

5.1 Introduction 119

5.2 Electromagnetic and Charge Transfer Enhancement 123

5.2.1 Electromagnetic Enhancement 124

5.2.2 Charge Transfer or Chemical Enhancement 128

5.2.3 Stages in the SERS Process 133

5.3 Surface Enhanced Resonance Raman Scattering (SERRS) 134

5.4 Selection Rules 135

5.5 Surface Chemistry 137

5.6 Substrates 139

5.7 Quantitation and Multiplex Detection 145

5.8 Summary 147

Chapter 6 Applications 151

6.1 Introduction 151

6.2 Inorganics and Minerals and Environmental Analysis 151

6.3 Art and Archaeology 156

6.4 Polymers and Emulsions 158

6.4.1 Overview 158

6.4.2 Simple Qualitative Polymer Studies 158

6.4.3 Quantitative Polymer Studies ...

Biographie:

Ewen Smith, Emeritus Professor, University of Strathclyde, UK.

Geoffrey Dent, GD Analytical Consulting, and University of Manchester, UK....

Sommaire:

Second edition of the guide to the modern techniques that demonstrate the potential of Raman spectroscopy

Completely revised and updated, the second edition of Modern Raman Spectroscopy presents the information needed for clear understanding and application of the technique of Raman Spectroscopy in a range of areas such as pharmaceuticals, forensics, and biology. The authors?noted experts on the topic?reveal how to make full use of the critical information presented and include a wealth of examples of the pitfalls that can be encountered.

The text opens with a description of the basic theory to assist readers in making a practical interpretation of Raman Spectra. Chapters include the main equations that are used in order to highlight the theory's meaning and relevance while avoiding a full mathematical treatment. Modern Raman Spectroscopy provides a firm grounding, combined with a variety of references, from which to approach a more comprehensive study of specific aspects of Raman Spectroscopy. This newly revised edition:

• Includes instrumentation sections that now contain Spatially Offset Raman scattering and transmission Raman scattering
• Offers an updated SERS chapter that presents recent examples and Tip enhanced Raman scattering
• Contains updated information with an emphasis on pharmaceutical, forensic, and biological applications
• Introduces modern techniques in the imaging and mapping of biological samples and more advanced methods which are becoming easier to use

Written for users of Raman Spectroscopy in industry, including non analysts, researchers, and academics, the second edition of Modern Raman Spectroscopy clearly demonstrates the potential of using Raman Spectroscopy for a wide range of applications....