Unit 1:
Rotational Spectroscopy [6 h]Interaction of electromagnetic radiation with matter. Factors affecting intensities and band widths of spectral lines. Origin of pure rotational spectra – diatomic and polyatomic molecules, selection rules, intensities of spectral lines. Instrumentation of microwave spectroscopy. Microwave spectra in determination of structure of molecules. Applications in analysis of chemistry of space.
Unit 2:
Vibrational and Vibration-Rotation Spectroscopy [13 h]Vibration spectra of diatomic molecules – harmonic and anharmonic vibrations. Selection rules – classical, quantum mechanical and symmetry. Vibrating rotator – Born-Oppenheimer approximation, rotational character of vibration spectra, origin of vibration-rotation spectra. Different modes of vibrations. Vibration spectra of polyatomic molecules. Fermi resonance. Instrumentation of FTIR spectrophotometer.
Unit 3:
Raman Spectroscopy [11 h ]Classical and quantum mechanical theories on Raman scattering. Origin of rotational and vibrational Raman spectra. Instrumentation. Comparison between IR and Raman spectra – application of group theory – rule of mutual exclusion.
Unit 4:
Electronic Spectroscopy [12 h]Electronic spectra of atoms – single and multi electron systems, j-j and L-S coupling. Electronic spectra of diatomic and polyatomic molecules – vibrational fine structure, Frank-Condon principle. Selection rules. Application of group theory in electronic spectra. Theory of fluorescence spectroscopy quantum yield, lifetime.
Unit 5:
Spin Resonance Spectroscopy [18 h]Nuclear Magnetic Resonance – Classical and quantum mechanical approach – nuclear spin, magnetic moment, nuclear magnetic resonance, chemical shift, spin-spin coupling, relaxation processes. Dynamic NMR spectroscopy. Multiple resonance techniques. 2D and solid state NMR. Instrumentation of NMR sampling. Spectra involving 1H, 13C, 19F and 31P nuclei. Electron Spin Resonance – Theory – electron spin, magnetic moment, electron spin resonance, hyperfine structure, line width and anisotropy. Dynamic ESR. Triplet state in ESR. Double resonance techniques. Instrumentation. ESR spectra of organic and inorganic compounds. Nuclear Quadrupolar Resonance – Theory – Nuclear quadrupolar moment, electric field gradient, the asymmetry parameter, nuclear quadrupolar transitions involving axially symmetric and axially non-symmetric molecules. Applications of NQR to analyze chemical bonding, molecular structure, solid state effects and hydrogen bonding.