Rotational Raman Spectroscopy

Question 1

Physical mechanism for rotational Raman

Answer 1

Interaction of electric field of light with polarisability of molecule, photons are scattered, not absorbed

Question 2

What’s an induced dipole

Answer 2

Distortion of electron distribution

Question 3

Gross selection rule rotational Raman

Answer 3

Molecule must be anisotropically polarisable so all molecules except spherical rotors

Question 4

Specific selection rule rotational Raman

Answer 4

Δj = +-2

Question 5

Stoke lines rotational Raman

Answer 5

Δj = +2

Question 6

Antistoke lines rotational Raman

Answer 6

Δj = -2

Question 7

Raleigh line

Answer 7

Usually 1000x brighter than stokes/anti stokes lines

Question 8

Diatomic rotational Raman spectral lines are spaced by

Answer 8

4B