ELEMENTS OF SPECTROSCOPY
Learning outcomes of the course unit
give the theoretical basis to understand and analyze optical spectroscopy and Raman experiments
Course contents summary
Basics: Time dependent quantum mechanics and time dependent perturbation theory; Fermi golden rule.
Electromagnectic radiation. e.m. radiation - matter interaction hamiltonian: semiclassic approximation; Electric dipole approximation.
Electronic molecular spectroscopy: Applications of the Fermi golden rule: Absorption and emission of light. Franck-Condon approximation; Beyond Condon approximation; Selection rules. Beyond the elctric dipole approximation: Electric Quadrupole and magnetic dipole.
Vibrational spectroscopy: Harmonic approximation: normal modes of vibrations. IR activity and selection rules. Beyond the harmonic approximation: combination modes and overtones.
Raman spectroscopy: Rayleigh and Raman scattering. Albrecht theory of vibrational Raman intensity.
Two lab experiences:
1) Absorption and emission (fluorescence) spectra of push-pull organic dyes.
2) Raman spectra of push-pull organic dyes as a function of the exciting laser line (resonant behavior)
Recommended readings
G.C.Schatz, M.A.Ratner, Quantum Mechanics in Chemistry, Dover (2002)
J.L.Mc Hale, Molecular Spectroscopy, Prentice Hall (1998)
Review papers easily available in the library
