Max Diem - Quantum Mechanical Foundations of Molecular Spectroscopy

1. Chapter 1
2. Chapter 5
3. Chapter 8
4. Chapter 9
5. Chapter 10

1. Chapter 1
2. Chapter 2
3. Chapter 3
4. Chapter 4
5. Chapter 5
6. Chapter 6
7. Chapter 7
8. Chapter 8
9. Chapter 9
10. Chapter 10
11. Chapter 11
12. Appendix 2
13. Appendix 3
14. Appendix 4

Max Diem

Author

Max Diem, PhD

Professor Emeritus
Department of Chemistry
Northeastern University
Laboratory of Spectral Diagnosis
Boston, MA
USA

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When the author took courses in quantum mechanical principles and chemical bonding in graduate school in the early 1970s, the course materials seldomly covered the fascinating interplay between spectroscopy and quantum mechanics, and textbooks of these days devoted the majority of space to derivations and mathematical principles and the discussion of the hydrogen atom and chemical bonding. While an understanding of these subjects is, of course, a necessity for further study, this book emphasizes a slightly different approach to quantum mechanics, namely, one from the viewpoint of a spectroscopist. In this approach, the existence of stationary energy states either electronic, vibrational, rotational, or spin states is considered the fundamental concept, since spectroscopy exists because of transitions between these states. Quantum mechanics provides the theoretical framework for the interpretation of experimental data. On the other hand, spectroscopic results provide the impetus for refining theories that explain the results. Classical physics cannot provide this framework, since the idea of stationary energy states violates the laws of classical physics.