Post on 01-Apr-2021
transcript
Wednesday, April 8
Reminders: • Take-home due FRIDAY
Handouts:
Readings: • Chang & Thoman: Appendix 11.1, 14.6
Today: • Other types of spectroscopy
• Vibronic • NMR
• Moving to the solid state
Last Time: - Finished practice problems
Electronic-vibrational (vibronic) transitions
Electronic-vibrational (vibronic) transitions
Franck-Condon Principle
Energy
UV/Vis IR Microwave
• Electronic Transitions • HOMO-LUMO gap • Sharp = Atoms • Broad = Molecules
• Vibrational transitions • Bond strength • Bond Order
• Rotational transitions • Bond length • Geometry
Molecules only
Radio X-Ray
14
A
A
B
B