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Explore the unique aspects of photochemistry, such as ozone depletion, Earth's atmosphere concentration profiles, greenhouse effect chemistry, and global warming effects. Delve into topics like organic photochemistry, astrochemistry, and the chemistry of big organic molecules. Discover the intriguing world of laser radiation, ion yield, and reaction cross sections in photochemical processes.
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Photochemistry can be dramatically different from “ordinary” chemistry See example below
Cl Cl Ar Ljósefnafræði ; Dæmi / photochemistry example:
Cl Cl Ar Ljósefnafræði ; Dæmi / photochemistry example: . . .
Cl Cl Ar Ljósefnafræði ; Dæmi / photochemistry example:
- + Cl Ar Ljósefnafræði ; Dæmi / photochemistry example: Cl
Cl Ar Ljósefnafræði ; Dæmi / photochemistry example: Cl
O3 Hvernig er efnafræði ósoneyðingar- innar?/ Ozon depletion? O3 Cl
( ) 20 km ( ) Earth
Heildarloftstyrkur og ósonstyrkur yfir jörðu. / Concentration profiles for air and ozone in the Earth´s atmosphere.
20 km Earth
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.
20 km Earth
20 km O3 + O -> O2+O2 Earth
Chemistry and spectroscopy of the greenhouse effect/ Global warming effects(?)
Gegnskin og gleypni andrúmsloftsins SÝN ....................................IR............................... ÚF
O=C=O Gleypni Bylgjulengd (mm)
Ultraviolet Visible Near-IR Infrared Far-Infrared Microwave
Organic photochemistry: photoisomerization
Big organic molecules C2H2 ??? : Life(?)
Big organic molecules C2H2 ??? : Life(?)
C2H2 ??? C CH2 C2 Big organic molecules : Life(?)
LASER radiation of C2H2 Ion yield C2H2+ C+ C2+ H+ Magn jóna C2H+ CH+ CH2+ Mw Time of flight
HCCH*: Orka HCCH:
+ + C2 C2 H2 Orka HCCH*:
Orka HCCH*:
C CH2 Orka HCCH*:
Reaction cross section: A + M ??? M1 + M2 ??? A + B C + D
Cross section = s = <d>2p Reaction cross section: A + M ??? M1 + M2 ??? A + B C + D d But ions:
+ + - - - + - + + + F µ 1/r2 But ions: Reaction cross section: A+ + B C + D
+ + - - - + - + + + But Ions: Reaction cross section: A+ + B C + D
+ + But ions: Reaction cross section: A+ + B C + D Collision frequency much larger
Ions: + Collision cross section = s >> <d>2p Reaction cross section: A + M ??? M1 + M2 ??? A + B C + D d