electromagnetic waves. electronic transitions vibrational fine structure
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Electromagnetic waves
Electronic transitions
Vibrational fine structure
Stretching and bending vibrational modes for a CH2 grouphttp://en.wikipedia.org/wiki/Infrared_spectroscopy
Normal vibrational modeshttp://upload.wikimedia.org/wikipedia/commons/9/9b/1D_normal_modes_%28280_kB%29.gif
H2O
CO2
Part of the rotational-vibrational spectrum of HCl Gas, showing the presence of P- and R- branches. Frequency is on the x-axis, and transmittance on the y-axis.
Kinetic techniques
Determination of Concentration by Spectroscopic Methods
• Beer’s Law
lcAI
I 010log
• Io = Intensity of incident light
• I = Intensity of transmitted light = molar extinction coefficient• l = path length of cell• c = concentration of sample
Quantitative aspect
When X = Y and [X] + [Y] is constant, Isosbestic points occur
Morse energy curve for a diatomic molecule
Morse curve
Anharmonic Oscillator Model for a Diatomic Molecule
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