1. 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 (palmer.475@osu.edu) and posted on VIPEr (www.ionicviper.org) on April 25, 2014. Copyright Alycia M. Palmer 2014. This work is licensed under the Creative Commons Attribution Non- commercial Share Alike License. To view a copy of this license visit http://creativecommons.org/about/license/.www.ionicviper.orghttp://creativecommons.org/about/license/

2. 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

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

4. 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

5. [Ru(bpy) 3 ] 2+ excited state processes E Nuclear coordinate 1. 2. a. b. 3. a. b. Slide #5

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

7. 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

8. 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