B.Sc Chemistry- Spectroscopy Sem 5 2019-22
Molecular Spectroscopy-I (12 Hrs)
Introduction: electromagnetic radiation, regions of the spectrum, interaction of electromagnetic radiation with molecules, various types of molecular spectroscopic techniques, Born-Oppenheimer approximation.
Rotation spectroscopy: Introduction to rotational spectroscopy, Rotational energy levels, Selection rules.
Vibrational spectroscopy: Introduction, Selection Rules, Classical equation of vibration, calculation of force constant, concept of anharmonicity, Morse potential, dissociation energies, fundamental frequencies, overtones, hot bands. Degrees of freedom for poly atomic molecules, modes of vibration (H2O and CO2 as examples), finger print region, Fermi resonance.
Raman spectroscopy: Introduction, Classical and quantum treatment of Raman effect, Qualitative treatment of Rotational Raman effect; Vibrational Raman spectra, Stokes and anti-Stokes lines: their intensity difference, rule of mutual exclusion.
Molecular Spectroscopy-II (10 Hrs)
Electronic spectroscopy: Introduction, selection rule, Franck-Condon principle,
electronic transitions, singlet and triplet states, dissociation and predissociation. Polyatomic
molecules – qualitative description of σ, π and n- molecular orbitals, their energy levels and
the respective transitions. Lambert-Beer’s law.
Nuclear Magnetic Resonance (NMR) spectroscopy: Principles of NMR spectroscopy, Larmor precession, chemical shift and low resolution spectra, different scales, spin-spin coupling.
Electron Spin Resonance (ESR) spectroscopy: Principle, hyper fine structure, ESR of
simple radical - methyl radical
