L1 /
17
CH1012
UV-Vis AND IR
• UV-Visible
absorptions occur between
high lying occupied MOs and low lying
unoccupied MOs - electronic spectroscopy .
high lying occupied MOs and low lying
unoccupied MOs - electronic spectroscopy .
Excited
States
Ground State
• Infra Red
absorptions occur
between molecular vibrational
states - vibrational spectroscopy
between molecular vibrational
states - vibrational spectroscopy
• In both
types of spectroscopy
the sample is usually placed in
solution in a small sample
vial called a cuvette.
the sample is usually placed in
solution in a small sample
vial called a cuvette.
