Infrared and Raman Spectroscopy: Principles and Spectral InterpretationInfrared and Raman Spectroscopy: Principles and Spectral Interpretation explains the background, core principles and tests the readers understanding of the important techniques of Infrared and Raman Spectroscopy. These techniques are used by chemists, environmental scientists, forensic scientists etc to identify unknown chemicals. In the case of an organic chemist these tools are part of an armory of techniques that enable them to conclusively prove what compound they have made, which is essential for those being used in medical applications. The book reviews basic principles, instrumentation, sampling methods, quantitative analysis, origin of group frequencies and qualitative interpretation using generalized Infrared (IR) and Raman spectra. An extensive use of graphics is used to describe the basic principles of vibrational spectroscopy and the origins of group frequencies, with over 100 fully interpreted FT-IR and FT-Raman spectra included and indexed to the relevant qualitative interpretation chapter. A final chapter with forty four unknown spectra and with a corresponding answer key is included to test the readers understanding. Tables of frequencies (peaks) for both infrared and Raman spectra are provided at key points in the book and will act as a useful reference resource for those involve interpreting spectra. This book provides a solid introduction to vibrational spectroscopy with an emphasis placed upon developing critical interpretation skills. Ideal for those using and analyzing IR and Raman spectra in their laboratories as well as those using the techniques in the field.
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The Nujol mull preparation of powdered starch provides an unacceptably poor quality FT-IR spectrum and a so-called false spectrum. A broadening of the most intense bands and a strengthening of the weak bands characterize false IR ...
60 40 20 0 100 80 60 40 20 0 % T r a n s m i t t a n c e (A): Water cast film/ZnSe (B): Nujol mull N N 600 3500 3000 2500 2000 1800 1600 1400 1200 1000 800 Wavenumber (cm–1) 100 80 cell, which can vary in path length from 10 cm to 8 ...
SOLID-POWDERED SAMPLES: KBR DISCS AND NUJOL MULLS Solid-powdered samples can be prepared as fine particles dispersed in NUJOL or as a disk in a transparent KBr matrix. A NUJOL mull preparation simply mixes mineral oil and finely ground ...
The Nujol spectrum is shown as a solid line and the Fluorolube spectrum is shown as a dotted line. KBR DISC SAMPLE PREPARATION A KBr disc involves mixing of dried KBr powder and finely ground sample. The KBr/ sample mixture forms a ...
Remedies include adding KBr or KI and applying pressure to obtain a clear plate or adding NUJOL oil to the a roughened surface. Samples or substrates with very high refractive index can give rise to focal shifts.
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Table des matières
1 | |
7 | |
27 | |
Chapter 4 Environmental Dependence of Vibrational Spectra | 55 |
Chapter 5 Origin of Group Frequencies | 63 |
Characteristic Group Frequencies | 73 |
Chapter 7 General Outline and Strategies for IR and Raman Spectral Interpretation | 117 |
Chapter 8 Illustrated IR and Raman Spectra Demonstrating Important Functional Groups | 135 |
Chapter 9 Unknown IR and Raman Spectra | 177 |
Appendix IR Correlation Charts | 213 |
Index | 217 |
Autres éditions - Tout afficher
Infrared and Raman Spectroscopy: Principles and Spectral Interpretation Peter Larkin Aucun aperçu disponible - 2017 |
Infrared and Raman Spectroscopy: Principles and Spectral Interpretation Peter J. Larkin Aucun aperçu disponible - 2011 |