1. Powerpoint Templates Page 1 Powerpoint Templates Electronic Spectroscopy

2. Powerpoint Templates Page 2

3. Powerpoint Templates Page 3

4. Powerpoint Templates Page 4

5. Powerpoint Templates Page 5

6. Powerpoint Templates Page 6

7. Powerpoint Templates Page 7

8. Powerpoint Templates Page 8

9. Powerpoint Templates Page 9

10. Powerpoint Templates Page 10  UV-Vis Terminology –Chromophore: a UV-Visible absorbing functional group –Bathochromic shift (red shift): to longer wavelengths –Auxochrome: a substituent on a chromophore that causes a red shift –Hypsochromic shift (blue shift): to shorter wavelengths –Hyperchromic shift: to greater absorbance –Hypochromic shift: to lesser absorbance

11. Powerpoint Templates Page 11  Classes of Electron transitions (1) ,  and n electrons (mostly organics) (2) d and f electrons (inorganics/organometallics) (3) charge-transfer (CT) electrons

12. Powerpoint Templates Page 12    * and    * transitions: high-energy, accessible in vacuum UV ( max <150 nm). Not usually observed in molecular UV-Vis. n   * and    * transitions: non-bonding electrons (lone pairs), wavelength ( max ) in the 150-250 nm region. n   * and    * transitions: most common transitions observed in organic molecular UV- Vis, observed in compounds with lone pairs and multiple bonds with max = 200-600 nm.  Charge transfer (CT) –MLCT (metal-to-ligand charge transfer) –LMCT (ligand-to-metal charge transfer)

13. Powerpoint Templates Page 13

14. Powerpoint Templates Page 14

15. Powerpoint Templates Page 15

16. Powerpoint Templates Page 16

17. Powerpoint Templates Page 17

18. Powerpoint Templates Page 18