Student Handouts Refer to the instructor’s version of the “Photochemistry” presentation for facilitator notes regarding the use of these slides. Created.

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Presentation transcript:

Student Handouts Refer to the instructor’s version of the “Photochemistry” presentation for facilitator notes regarding the use of these slides. Created by Alycia M. Palmer, The Ohio State University and posted on VIPEr ( on April 25, Copyright Alycia M. Palmer This work is licensed under the Creative Commons Attribution Non- commercial Share Alike License. To view a copy of this license visit

Molecular Orbital Diagrams Spherical electric field Ru d-orbitals E [Ru(en) 6 ] 2+ [Ru(bpy) 3 ] 2+ Ru 2+ Multiplicity = 2S+1 Ground state S = _____ Multiplicity = _____ Slide #2

Metal-to-ligand charge transfer (MLCT) Ground state λ = 450 nm MLCT excited state Slide #3

ππ * state bpy π * Ru e g * Ru t 2g bpy π E bpy π * Ru e g * Ru t 2g bpy π E bpy π * Ru e g * Ru t 2g bpy π E bpy π * Ru e g * Ru t 2g bpy π E 1 MLCT state 3 MLCT state 1 MC state Absorption of UV/visible light causes movement of _____________ between _______________. ______________ transitions happen between ____________. e – config. Slide #4

[Ru(bpy) 3 ] 2+ excited state processes E Nuclear coordinate a. b. 3. a. b. Slide #5

Electronic Transitions S0S0 S1S1 T1T1 E Nuclear coordinate E S0S0 S1S1 T1T1 1. _____________________________2. __________________________ T2T2 T2T2 Slide #6

Transition _________________ E S0S0 S1S1 T1T1 T2T2 S2S2 E S0S0 S1S1 T1T1 T2T2 S2S2 E S0S0 S1S1 T1T1 T2T2 S2S2 E S0S0 S1S1 T1T1 T2T2 S2S2 E S0S0 S1S1 T1T1 T2T2 S2S2 E S0S0 S1S1 T1T1 T2T2 S2S2 Slide #7

Excited State Quenching 1 GS 1 MLCT 3 MLCT E Nuclear coordinate 3 MC The 3 MLCT lifetime is ___________. The 3 MLCT state is deactivated by molecules in solution called ____________________. Slide #8