1. Photochemistry can be dramatically different from “ordinary” chemistry See example below

2. Ar Cl

3. Ar Cl...

4. Ar

5. Cl Ar + -

6. Cl Ar

7. O3 O3O3 Cl Hvernig er efnafræði ósoneyðingar- innar?/ Ozon depletion?

9. ( ) 20 km ( )

10. Heildarloftstyrkur og ósonstyrkur yfir jörðu. / Concentration profiles for air and ozone in the Earth´s atmosphere.

11. 20 km

12. Gleypni ósons á nær-útfjólubláa litrófssviðinu. Gleypnistuðull er í réttu hlutfalli við gleypni efnisins fyrir fastann efnisstyrk. Absorption cross section of ozone in the near UV spectral region.

13. 20 km

14. 20 km O 3 + O -> O 2 +O 2

15. Chemistry and spectroscopy of the greenhouse effect/ Global warming effects(?)

19. Gegnskin og gleypni andrúmsloftsins ÚF SÝNSÝN....................................IR...............................

20. Bylgjulengd (  m) Gleypni O=C=OO=C=O

24. UltravioletVisibleNear-IRInfraredFar-InfraredMicrowave

25. Organic photochemistry: photoisomerization

26. Stilben e(1)

27. Stilbene(2)

28. Astrochemistry

29. C2H2C2H2 Big organic molecules : Life(?) ???

30. C2H2C2H2 Big organic molecules : Life(?) ???

31. C2H2C2H2 Big organic molecules : Life(?) ??? C2C2 C CH 2

32. H+H+ CH + CH 2 + C+C+ C2+C2+ C2H+C2H+ C2H2+C2H2+ Magn jóna Ion yield LASER radiation of C 2 H 2 Mw Time of flight

33. Orka HCCH: HCCH*:

34. Orka C2C2 H2H2 HCCH*: C2C2 + +

35. Orka HCCH*:

36. Orka HCCH*: CH 2 C

37. A + M ??? M 1 + M 2 ??? A + B C + D Reaction cross section:

38. A + M ??? M 1 + M 2 ??? A + B C + D Cross section =  = 2  d But ions: Reaction cross section:

39. A + + B C + D But ions: ++ - - - - + + + + F  1/r 2 Reaction cross section:

40. + A + + B C + D But Ions: + - - - - + + + + Reaction cross section:

41. A + + B C + D But ions: ++ Collision frequency much larger Reaction cross section:

42. A + M ??? M 1 + M 2 ??? A + B C + D d + Ions: Collision cross section =  >> 2  Reaction cross section: