MOLECULAR SPECTROSCOPY
Academic year and teacher
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- Versione italiana
- Academic year
- 2016/2017
- Teacher
- MAURIZIO DAL COLLE
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- CHIM/02
Training objectives
- The main goal of the course is to provide the students with the ground concepts of modern molecular spectroscopy. Starting from an exposition of the interaction between matter and electromagnetic radiation, the formulation of Fermi's "golden rule" is afforded, stressing its key role in the understanding of any type of spectroscopy. The ground concepts are then given concerning roto-vibrational spectroscopy of both diatomic and polyatomic molecules, pointing out with particular stress the concept of normal coordinates and of their relationships with molecular symmetry. Key concepts are then provided for an understanding of electronic spectroscopies. The course is concluded with a survey of magnetic resonance spectroscopies, both nuclear and electronic.
Prerequisites
- Basic knowledge of Physical Chemistry
Course programme
- Interaction of light and matter: time-dependent perturbation theory; interaction of a molecule with an electromagnetic plane wave; spontaneous emission. Roto-vibrational spectroscopy of diatomic molecules: wave functions and energies; energy corrections up to the first order of perturbation theory; vibro-rotational energy transitions; Raman effect. Roto-vibrational spectroscopy of polyatomic molecules: rotation of polyatomic molecules; microwave spectra; molecular vibrations; symmetry and vibrations; symmetry classification of normal coordinates; selection rules in roto-vibrational spectra; effect of symmetry in vibrational transitions. Electronic spectroscopy: transition electronic dipole moment; dissociation energies from electronic spectra; oscillator strength; ionization energy from U.V. spectra; vibronic transitions in polyatomic molecules; vibrational borrowing; photoelectron spectroscopy; Jahn-Teller effect. Magnetic resonance: nuclear magnetic resonance; chemical shifts; spin-spin splittings; origin of the spin-spin coupling; spin relaxation; electron spin resonance.
Didactic methods
- Frontal lectures on all the course’s topics. Exercises on the application of the Group theory to determine the symmetry of the normal modes and the selection rules for vibrational, Raman and electronic transitions. Computational exercises.
Learning assessment procedures
- Oral examination. The aim of the exam is to verify at which level the learning objectives previously described have been acquired by the student.
Reference texts
- I.N. Levine, "Molecular Spectroscopy",John Wiley and Sons.
R. Cimiraglia, "Note al corso di Spettroscopia Molecolare", on-line al sito http://chim183.unife.it/chifi3/chifi3.html
