21.10.2014 Views

Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

12.4 Radiationless processes in photoexcited molecules 255<br />

I Figure 12.11: Adiabatic model PES’s for C 2 H 4 with the conical intersection at =90 ◦ .<br />

Photochemical cis-trans isomerization of C 2 H 4<br />

Adiabatic PES:<br />

<br />

<br />

conical intersection<br />

(s-2) dimensional<br />

<br />

<br />

<br />

<br />

<strong>Physical</strong> <strong>Chemistry</strong> III: <strong>Chemical</strong> <strong>Kinetics</strong> • © F. Temps, IPC Kiel 260<br />

I<br />

Figure 12.12: Wave packet motion in a complex photo-induced reaction.<br />

Dynamics of Photo-Induced Reactions: Photochemical Funnels<br />

Conical Intersection =<br />

"Photochemical Funnel"<br />

Energy<br />

Q b<br />

S 0<br />

S 1<br />

S 0<br />

Reaction Coordinate<br />

<strong>Physical</strong> <strong>Chemistry</strong> III: <strong>Chemical</strong> <strong>Kinetics</strong> • © F. Temps, IPC Kiel 262

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!