Direkt zu

 

Jablonski Diagram

Processes associated with electronic excited states can be visualized with the so called JABLONSKI diagram. It uses the FRANCK-CONDON principle and relinquishes the visualization of the nuclei distance. Only electronic transitions and vibrational levels are included. This enables the inclusion of additional information on the electronic processes. The most prominent electronic transitions are exemplarily illustrated in figure 1:

 

  • Absorption of light (A): An electron is excited from the ground state to an excited state.
  • Fluoreszence (F): Transition of an electron from the excited singlet state to the ground state during which light is emitted.
  • Phosphoreszence (P): Transition of an electron from the excited triplet state to the ground state during which light is emitted.
  • Vibrational relaxation (SR): An electron relaxes from an excited vibrational level to the lowest vibrational level without emitting light.
  • InternalConversion(IC): Nonradiative transition of an electron between electronic states of similar spin multiplicity.
  • Intersystem Crossing (ISC): Nonradiative transition of an electron between electronic states of different spin multiplicity.

 

Jablonski

Figure 1: JABLONSKI diagram of an organic molecule with activation and deactivation processes and their rate constants. Radiative transitions are indicated by straight , vibrational relaxations by squiggly and transitions between different electronic states by dashed arrows .

 

 

  1. BECKER, ; BÖTTCHER, H.; DIETZ, F.; REHOREK, D.; ROEWER, G.; SCHILLER, K.; TIMPE, H.-J.: Einführung in die Photochemie, 3. bearb. aufl. edn., 1991, Deutscher Verlag der Wissenschaften GmbH, ISBN 978–3–3260–0604–8.
  2. WÖHRLE, D.; TAUSCH, M. W.; STOHRER, W.-D.: Photochemie, 1998, Wiley VCH Verlag GmbH, ISBN 3527295453.

 
Found an error or want to submit a new article? Please send your correction or article in by mail in word or pdf to photo-wiki@itc.uni-stuttgart.de.