1. Substantially Conductive Polymers Part 05

2. 2 Conjugation Length Effects on ionization potential and electron affinity Oxidation Potential Reduction Potential 4.4 eV HOMO level LUMO level

3. 3 Conjugation Length Effects on band gap

4. 4 Conjugation Length Effects on absorption wavelength

5. Substituent Effects on the Ionization Potential (eV) (Small Molecules) 5

6. 6 Substituent Effects on the Ionization Potential (eV)

7. 7 Precursor routes for conducting polymers Ring opening metathesis polymerization (ROMP) (Olefin metathesis polymerization) Radical chain polymerization

8. 8 PPV via Wessling Route require strong oxidant (Dow Chemical route) Anionic chain polymerization bissulfonium salt sulfonium polyeletrolyte

9. 9 mild oxidant work fine Substituent effects: 1. solubility: procesibility, quality of film/coating, application potentials 2. e-effect (donating/withdrawing): HOMO/LUMO, bandgap, coloring, redox, e-density, e-polarizability 3. steric hindrance: chain conformation, packing morphology, e-transport bissulfonium salt sulfonium polyeletrolyte RX NaOH CH 2 O HCl SR 2

10. 10

11. Orientable Copolymers 11

12. Polymer, 30, 1041 (1989) R. W. Lenz, C. C. Han and M. Lux 12 + + +

13. 13 e e Electron transport: Interchain hopping vs Intrachain moving

14. 14

15. 15

16. Electron Donating Groups Promote Elimination 16