HighLight_exam_final

HighLight_exam_final - Quantum Chemistry Highlights for...

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Quantum Chemistry Highlights for Final Exam, May 2008 Checklist of key ideas MOLECULAR SPECTROSCOPY 2: ELECTRONIC TRANSITIONS (Chapter 14) The Franck–Condon principle states that, because the nuclei are so much more massive than the electrons, an electronic transition takes place very much faster than the nuclei can respond. The intensity of an electronic transition is proportional to the Franck–Condon factor, the quantity | S ( v f , v i )| 2 , with τ ν d S V V V i f i f Ψ Ψ = ) , ( . A Jablonski diagram is a schematic diagram of the various types of nonradiative and radiative transitions that can occur in molecules. Fluorescence is the spontaneous emission of radiation arising from a transition between states of the same multiplicity. Phosphorescence is the spontaneous emission of radiation arising from a transition between states of different multiplicity. Intersystem crossing is a nonradiative transition between states of different multiplicity. Internal conversion is a nonradiative transition between states of the same multiplicity. Applications of lasers in chemistry include multiphoton spectroscopy, Raman spectroscopy, precision-specified transitions, isotope separation, time-resolved spectroscopy, and single-molecule spectroscopy. MOLECULAR SPECTROSCOPY 3: MAGNETIC RESONANCE (Chapter 15)
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This note was uploaded on 09/01/2008 for the course CHEM 452 taught by Professor Sergeia. during the Spring '08 term at Penn State.

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HighLight_exam_final - Quantum Chemistry Highlights for...

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